21517662721

21,517,662,721 is an odd composite number. It is composed of a single prime number multiplied by itself three times.

What does the number 21517662721 look like?

This visualization shows the relationship between its 1 prime factors (large circles) and 5 divisors.

21517662721 is an odd composite number. It is composed of one distinct prime number multiplied by itself three times. It has a total of five divisors.

Prime factorization of 21517662721:

3834

(383 × 383 × 383 × 383)

See below for interesting mathematical facts about the number 21517662721 from the Numbermatics database.


Names of 21517662721

  • Cardinal: 21517662721 can be written as Twenty-one billion, five hundred seventeen million, six hundred sixty-two thousand, seven hundred twenty-one.

Scientific notation

  • Scientific notation: 2.1517662721 × 1010

Factors of 21517662721

  • Number of distinct prime factors ω(n): 1
  • Total number of prime factors Ω(n): 4
  • Sum of prime factors: 383

Divisors of 21517662721

  • Number of divisors d(n): 5
  • Complete list of divisors:
  • Sum of all divisors σ(n): 21573991681
  • Sum of proper divisors (its aliquot sum) s(n): 56328960
  • 21517662721 is a deficient number, because the sum of its proper divisors (56328960) is less than itself. Its deficiency is 21461333761

Bases of 21517662721

  • Binary: 101000000101000110101111010000000012
  • Hexadecimal: 0x5028D7A01
  • Base-36: 9VV26TD

Squares and roots of 21517662721

  • 21517662721 squared (215176627212) is 463009808974713123841
  • 21517662721 cubed (215176627213) is 9962888906032515816542942031361
  • 21517662721 is a perfect square number. Its square root is 146689
  • The cube root of 21517662721 is 2781.4101294963

Scales and comparisons

How big is 21517662721?
  • 21,517,662,721 seconds is equal to 684 years, 10 weeks, 1 day, 32 minutes, 1 second.
  • To count from 1 to 21,517,662,721 would take you about one thousand, three hundred sixty-eight years!

    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 21517662721 cubic inches would be around 231.8 feet tall.

Recreational maths with 21517662721

  • 21517662721 backwards is 12726671512
  • The number of decimal digits it has is: 11
  • The sum of 21517662721's digits is 40
  • More coming soon!

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"Number 21517662721 - Facts about the integer". Numbermatics.com. 2024. Web. 29 March 2024.

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Numbermatics. (2024). Number 21517662721 - Facts about the integer. Retrieved 29 March 2024, from https://numbermatics.com/n/21517662721/

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The information we have on file for 21517662721 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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