19 (number)

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Cardinalnineteen
Ordinal19th
(nineteenth)
Factorizationprime
Prime8th
Divisors1, 19
Greek numeralΙΘ´
Roman numeralXIX
Binary100112
Ternary2013
Quaternary1034
Quinary345
Senary316
Octal238
Duodecimal1712
Hexadecimal1316
VigesimalJ20
Base 36J36

Nineteen 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.