Q: Is 20,809 a Prime Number?

A: Yes, 20,809 is a prime number.

Why is 20,809 a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 20809 can be evenly divided by 1 and 20,809, with no remainder.

Since 20,809 can be divided by just 1 and 20,809, it is a prime number.

Number	20,807	20,808	20,810	20,811
Prime?	yes	no	no	no

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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