How do you write 21,000 in words?

Twenty-one thousand. In British English, "twenty-one thousand".

What is the ordinal of 21,000?

Twenty-one thousandth, written 21000th.

21,000 in words

Twenty-one thousand

Number (1–3,999 for numerals)

Roman numeral

21,000 is written "twenty-one thousand". That spelling is the same in British and American English.

Where each word comes from

20,000 + 1,000 = 21,000
Digit	Place	Worth	Spoken as
2	ten thousands	20,000	twenty thousand
1	thousands	1,000	one thousand

The same number, other ways

In words (US): Twenty-one thousand
In words (UK): Twenty-one thousand
Ordinal: 21000th — twenty-one thousandth
Digits: 21,000

Writing it on a cheque

On a cheque the amount line reads "Twenty-one thousand and 00/100" — or "Twenty-one thousand only" in Indian and much of Commonwealth practice. The fraction or the word "only" exists to stop anyone appending digits after what you wrote. Draw a line through any space left over for the same reason.

Common questions

How do you write 21,000 in words?: Twenty-one thousand. In British English, "twenty-one thousand".
What is the ordinal of 21,000?: Twenty-one thousandth, written 21000th.

0 in words zero
8 in words eight
11 in words eleven
12 in words twelve
13 in words thirteen
15 in words fifteen
19 in words nineteen
20 in words twenty
21 in words twenty-one
40 in words forty
42 in words forty-two
50 in words fifty

Sources

Calculated on this page — At One Place

How these figures are compiled and checked