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A Prime number is any integer evenly divisible by only itself, and the number 1. Since 21 is divisible by 3 and 7, it is a composite number, not a prime number.

No, 21 is not a prime number.

21 is divisible by 1, 3, 7, & 21


No. 21=3*7
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Wiki User

โˆ™ 2012-09-10 16:19:16
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Umer Khan

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โˆ™ 2022-04-13 00:18:30
No
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Anonymous

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โˆ™ 2020-05-05 20:21:32

Is 21 a prime or composite

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Anonymous

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โˆ™ 2020-07-28 11:15:46

No

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Anonymous

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โˆ™ 2020-10-09 06:48:45

no

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Q: Is 21 a prime number
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