21,000
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Number
$21 \, 000$ (twenty-one thousand) is:
- $2^3 \times 3 \times 5^3 \times 7$
- The smallest integer which uses exactly $3$ words in its (British) English description:
- twenty-one thousand
Also see
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $21,000$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $21,000$