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? -**No

**Is 21 a composite number? -**Yes

**Prime determinants of 21 -**3, 7

**Is 21 a perfect square? -**No

**Factors 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.

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## 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.

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**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 |

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