| 19 (number) |
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Information About19 (number) |
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IN MATHEMATICS Nineteen is the 8th smallest Prime Number . The sequence continues 23 , 29, 31, 37... 19 is the seventh Mersenne Prime exponent. It is also a Keith Number , because it recurs in a Fibonacci -like sequence started from its base 10 digits: 1, 9, 10, 19... With respect to Divisibility , nineteen has a very simple test: 19 divides 100''a'' + ''b'' if and only if it divides ''a'' + 4''b''. Nineteen is a Centered Triangular Number , Centered Hexagonal Number , and an Octahedral Number . Every Positive Integer is the sum of at most nineteen Four th Power s (see Waring's Problem ). The decimal expansion of 1/19 has a period of maximum length: 18 digits. Nineteen is a Heegner Number and a Strictly Non-palindromic Number . 19 is the fourth Alternating Factorial . IN SCIENCE
Astronomy
IN MUSIC "19" is a 1985 hit song by Paul Hardcastle , with a strong Anti-war message, based on 19 reportedly being the average age of United States soldiers killed in the Vietnam War (this 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. Another acclaimed song with an anti-war sentiment is ''I Was Only 19 (A Walk in the Light Green)'', by the Australian group Redgum . It reached number one on the Australian charts in 1983 , and a Hip-hop version of the song produced by The Herd was voted in the top ten songs of class="copylinks">2005 By Listeners Of Radio Station [[Triple JJJ . Other songs with the number in their titles include "Nineteen" by the Old 97's and "Hey, Nineteen" by Steely Dan . 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. "19th Nervous Breakdown" is a song by the Rolling Stones . Also, there is a song by Joe Jackson entitled "Nineteen Forever". IN OTHER FIELDS Nineteen is
IN FICTION In Stephen King 's '' The Dark Tower '' series, nineteen is a number of mystical significance, as the characters come to encounter it in some form everywhere they turn. King was nineteen-years-old when he began writing this Magnum Opus , which he didn't finish until almost thirty years later. In the books, the number 19 comes to denote a sense of unreality and foreboding, making the characters' world seem as unreal to them as to the reader. EXTERNAL LINKS |
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