Is 21 an Integer?

Integer Question: Is 21 an Integer?

For 21 to be an integer, 21 has to be a whole number. Furthermore, for 21 to be an integer, you should be able to write 21 without a fractional or decimal component.

21 is a whole number that can be written without a fractional component, thus 21 is an integer.

The answer to the question: "Is 21 an integer?" is YES.

Check other numbers to see
if they are integers.

Is 21 a prime number?
Now you know that 21 is an integer, but do you know if 21 is a prime number?

Is 21 a composite number?
Could 21 possibly be a composite integer?

What are the factors of 21?
What are the factors of the integer 21 you ask?

Is 21 a square number?
Find out if 21 is a perfect square number!

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