Q: Is 21,009,345 a Composite Number?

 A: Yes, 21,009,345 is a composite number.

Why is 21,009,345 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 21,009,345 can be evenly divided by 1 3 5 7 15 19 21 35 57 95 105 133 285 399 665 1,995 10,531 31,593 52,655 73,717 157,965 200,089 221,151 368,585 600,267 1,000,445 1,105,755 1,400,623 3,001,335 4,201,869 7,003,115 and 21,009,345, with no remainder.

Since 21,009,345 cannot be divided by just 1 and 21,009,345, it is a composite number.


More Examples

Number 21,009,34321,009,34421,009,34621,009,347
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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