21418

21,418 is an even composite number composed of two prime numbers multiplied together.

What does the number 21418 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

21418 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 21418:

2 × 10709

See below for interesting mathematical facts about the number 21418 from the Numbermatics database.


Names of 21418

  • Cardinal: 21418 can be written as Twenty-one thousand, four hundred eighteen.

Scientific notation

  • Scientific notation: 2.1418 × 104

Factors of 21418

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 10711

Divisors of 21418

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 32130
  • Sum of proper divisors (its aliquot sum) s(n): 10712
  • 21418 is a deficient number, because the sum of its proper divisors (10712) is less than itself. Its deficiency is 10706

Bases of 21418

  • Binary: 1010011101010102
  • Hexadecimal: 0x53AA
  • Base-36: GIY

Squares and roots of 21418

  • 21418 squared (214182) is 458730724
  • 21418 cubed (214183) is 9825094646632
  • The square root of 21418 is 146.3488981851
  • The cube root of 21418 is 27.7710929099

Scales and comparisons

How big is 21418?
  • 21,418 seconds is equal to 5 hours, 56 minutes, 58 seconds.
  • To count from 1 to 21,418 would take you about five hours.

    This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

  • A cube with a volume of 21418 cubic inches would be around 2.3 feet tall.

Recreational maths with 21418

  • 21418 backwards is 81412
  • The number of decimal digits it has is: 5
  • The sum of 21418's digits is 16
  • More coming soon!

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"Number 21418 - Facts about the integer". Numbermatics.com. 2021. Web. 3 August 2021.

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The information we have on file for 21418 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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