20,000

← 19999 20000 20001 →
List of numbers Integers ← 0 10k 20k 30k 40k 50k 60k 70k 80k 90k →
Cardinal	twenty thousand
Ordinal	20000th (twenty thousandth)
Factorization	25 × 54
Greek numeral	${\displaystyle {\stackrel {\beta }{\mathrm {M} }}}$
Roman numeral	XX
Binary	1001110001000002
Ternary	10001022023
Senary	2323326
Octal	470408
Duodecimal	B6A812
Hexadecimal	4E2016
Armenian	Ֆ

20,000 (twenty thousand) is the natural number that comes after 19,999 and before 20,001.

20,000 is a round number, and is also in the title of Jules Verne's 1870 novel Twenty Thousand Leagues Under the Seas.^[relevant?]