Topic summary19 (number) Expand Summary Related topics ←10111213141516171819→List of numbersIntegers←0102030405060708090→CardinalnineteenOrdinal19th(nineteenth)Numeral systemnonadecimalFactorizationprimePrime8thDivisors1, 19Greek numeralΙΘ´Roman numeralXIX, xixBinary100112Ternary2013Senary316Octal238Duodecimal1712Hexadecimal1316Hebrew numeralי"טBabylonian numeral𒌋𒐝19 (nineteen) is the natural number following 18 and preceding 20. It is a prime number. Wikipedia source