19 (number)

← 18 19 20 →
← 10 11 12 13 14 15 16 17 18 19 → List of numbers — Integers ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	nineteen
Ordinal	19th (nineteenth)
Factorization	prime
Prime	8th
Divisors	1, 19
Greek numeral	ΙΘ´
Roman numeral	XIX
Binary	100112
Ternary	2013
Quaternary	1034
Quinary	345
Senary	316
Octal	238
Duodecimal	1712
Hexadecimal	1316
Vigesimal	J20
Base 36	J36

This article is about the number nineteen. For the year, see 19.

19 (also written as nineteen or ten-nine) is a number. It comes between eighteen and twenty, and is an odd number. It is also the 8th prime number, after 2, 3, 5, 7, 11, 13, and 17.

In Roman numerals, 19 is written as XIX.