The number 7.
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Its not a prime number. It is divisible by 7
No, it is divisible by 7.
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, & 21No. 21=3*7
7 is a prime number because it is only divisible by 1 and 7.
Because it's divisible by 7 !