Is 21 a element number? "No, 21 is not a element number." A number can be classified as prime or composite relying on the determinants it contains; it might either have only 2 components or more than 2 factors. Numbers choose 631 with just 2 factors, i.e. 1 and also 631 are dubbed prime numbers. However, numbers like 340 with an ext than 2 components are dubbed composite numbers. Let us uncover out how and why is 21 a element number or a composite number?

Is 21 a element number? - NoIs 21 a composite number? - YesPrime determinants of 21 - 3, 7Is 21 a perfect square? - NoFactors of 21 - 1, 3, 7, 21 ## Is 21 a prime Number?

No, 21 is no a prime number. The number 21 is divisible by 1, 3, 7, 21. Because that a number to be classified as a prime number, it need to have precisely two factors. Because 21 has an ext than 2 factors, i.e. 1, 3, 7, 21, that is not a prime number.

You are watching: Is 21 a prime or composite number ## Why is 21 not a prime Number?

To recognize whether 21 is element or composite, that is crucial to discover its factors.

Factors the 21: 1, 3, 7, 21

Since 21 has more than 2 factors, we deserve to say that 21 is no a prime number.

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## Is 21 a Composite Number?

Yes, since 21 has more than two factors i.e. 1, 3, 7, 21. In various other words, 21 is a composite number because 21 has an ext than 2 factors.

See more: How Many Cups In 48 Ounces To Cups), 48 Ounces To Cups

Problem Statements:

 Is 21 a element Number? No Is 21 a Composite Number? Yes Is 21 a Perfect Square? No Is 21 an Odd Number? Yes Multiples the 21 21, 42, 63, 84, 105, 126, 147, 168, 189, 210 Cube source of 21 2.758921 Is 21 an also Number? No Is 21 a Perfect Cube? No Square root of 21 4.582576 Square of 21 441

Fun Facts:

Numbers X and Y are stated to be coprime if they have only one typical factor the is 1.All primes except 2 space odd.23 is the the smallest prime number having consecutive digits.