19 (number) Totally Explained

Everything about 19th totally explained

19 (nineteen) is the natural number following 18 and preceding 20. It is a prime number.


Cardinal	19 nineteen
Ordinal	19th nineteenth
Numeral system	nonadecimal
Factorization	prime
Divisors	1, 19
Roman numeral	XIX
Roman numeral (Unicode)	XIX, xix
Binary	10011
Octal	23
Duodecimal	17
Hexadecimal	13

In mathematics Nineteen is the 8th smallest prime number. The sequence continues 23, 29, 31, 37... 19 is the seventh Mersenne prime exponent. 19 is the smallest Higgs prime for squares and cubes that has an index among Higgs primes that's less than its index among primes overall (because 17 isn't a Higgs prime).

In science

The atomic number of Potassium.

In religion

The number of angels guarding Hell according to the Qur'an: "Over it's nineteen" (74:30)

The number of surat Maryam in the Qur'an

The number of Arabic letters in the common formula, the Basmala, "In the name of God, Most Gracious, Most Merciful," being (without vowel marks) "bsm allh alrḥmn alrḥym" (External Link

)

A number allegedly encoded in the Qur'an (External Link

) as claimed by Dr. Rashad Khalifa, a biochemist from the USA (External Link

)

The Bahá'í calendar is structured such that a year contains 19 months of 19 days each, as well as a 19-year cycle and a 361-year (19x19) supercycle. The Báb and his disciples formed a group of 19, and there were 19 Apostles of Bahá'u'lláh.

In music

19 is the debut album from English soul and jazz singer Adele.
   "19" is a 1985 hit song by Paul Hardcastle, with a strong anti-war message, including sampled soundbites taken from a documentary about the Vietnam War in which 19 is claimed to have been the average age of United States soldiers killed in the conflict (an assertion which is widely disputed). The song was parodied by British satirist Rory Bremner as N-n-nineteen, Not Out, the title referring to the English cricket team's risible performance against the West Indies in the previous year.
   With a similar name and anti-Vietnam War theme, I Was Only 19 (A Walk in the Light Green), by the Australian group Redgum reached number one on the Australian charts in 1983. In 2005 a hip hop version of the song was produced by The Herd, and was voted in at #18 in the 2005 Triple J Hottest 100 playlist.
   Other songs with the number 19 in their titles: ť "Nineteen" by Buck-O-Nine

    "Nineteen" by Phil Lynott ť "Nineteen" by the Old 97's

    "Hey Nineteen" by Steely Dan ť "19th Nervous Breakdown" by the Rolling Stones

    "Nineteen Forever" by Joe Jackson ť "I Got A Feeling (Just Nineteen)" by Eagles of Death Metal

    "Nineteen in Naples" by Jonathan Richman ť "Nineteen" by Tegan and Sara

    "Balance of the 19" by Secret Chiefs 3 Nineteen has been used as an alternative to twelve for a division of the octave into equal parts. This idea goes back to Salinas in the sixteenth century, and is interesting in part because it gives a system of meantone tuning, being close to 1/3 comma meantone. 19 is also the title of Evan Yo's first album, because Evan was nineteen years old when the album released.
   Some organs use the 19th harmonic to approximate a minor third.

Literature

Stephen King's seven book epic The Dark Tower saga deploys the number 19 in books The Gunslinger, Wolves of the Calla, Song of Susannah, and The Dark Tower as a mysterious and important number. Such as the Ka-Tet of nineteen and many names adding up to nineteen, along with the number being a powerful key.

In other fields

Nineteen is

The nineteenth state to enter the Union of the United States was Indiana

Part of the name of a breakfast cereal: Product 19

The Soviet submarine K-19 was the first Soviet nuclear ballistic submarine

I-19 is the designation for a US interstate highway in Arizona

the height, in feet, of the statues of Abraham Lincoln and Thomas Jefferson in their respective memorials.

19 years is very close to 235 lunations. See Metonic cycle

In golf the "19th hole" is the clubhouse bar. In miniature golf it's an extra hole on which the winner earns an instant prize

A number encoded in Chemistry as claimed by Dr. Peter Plichta, a German chemist (External Link

). Also see (External Link

) for Plichta's claimed code-19 in chemistry

The retired football jersey number of Hall of Famers Johnny Unitas and Lance Alworth

The retired baseball jersey number of Baseball Hall of Fame members Robin Yount and Tony Gwynn.

The retired basketball jersey number of Willis Reed.

The retired hockey jersey number of Steve Yzerman.

The number of Colorado Avalanche center and captain Joe Sakic

The number of Vancouver Canucks winger and captain Markus Naslund

19 x 19 is also the standard size of a Go Board

The notional score of a single hand of Cribbage that's actually worth no points. (It isn't possible to earn a score of 19 in a single hand in Cribbage.)

The number of Ottawa Senators center Jason Spezza

Historical years

A.D. 19, 19 B.C., 1919, 2019, etc.

Further Information

Get more info on '19th'.

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