Q: Is 21,111,509 a Composite Number?

 A: No, 21,111,509 is not a composite number; it is a prime number.

Why is 21,111,509 not a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 21,111,509 can be evenly divided by 1 and 21,111,509, with no remainder.

Since 21,111,509 can be divided by just 1 and 21,111,509, it is not a composite number.


More Examples

Number 21,111,50721,111,50821,111,51021,111,511
Composite? yesyesyesyes
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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