20,000

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Twenty thousand is the natural number that comes after 19,999 and before 20,001. In words: twenty thousand. The ordinal form is twenty thousandth.

It can be factored as 2^5 × 5^4.

In common base representations:
- Binary: 100111000100000
- Octal: 47040
- Hexadecimal: 4E20

There are 983 prime numbers between 20,000 and 30,000.