21007

21,007 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21007 look like?

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

21007 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 21007:

7 × 3001

See below for interesting mathematical facts about the number 21007 from the Numbermatics database.


Names of 21007

  • Cardinal: 21007 can be written as Twenty-one thousand and seven.

Scientific notation

  • Scientific notation: 2.1007 × 104

Factors of 21007

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 3008

Divisors of 21007

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 24016
  • Sum of proper divisors (its aliquot sum) s(n): 3009
  • 21007 is a deficient number, because the sum of its proper divisors (3009) is less than itself. Its deficiency is 17998

Bases of 21007

  • Binary: 1010010000011112
  • Hexadecimal: 0x520F
  • Base-36: G7J

Squares and roots of 21007

  • 21007 squared (210072) is 441294049
  • 21007 cubed (210073) is 9270264087343
  • The square root of 21007 is 144.9379177441
  • The cube root of 21007 is 27.5923068945

Scales and comparisons

How big is 21007?
  • 21,007 seconds is equal to 5 hours, 50 minutes, 7 seconds.
  • To count from 1 to 21,007 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 21007 cubic inches would be around 2.3 feet tall.

Recreational maths with 21007

  • 21007 backwards is 70012
  • The number of decimal digits it has is: 5
  • The sum of 21007's digits is 10
  • More coming soon!

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"Number 21007 - Facts about the integer". Numbermatics.com. 2021. Web. 7 March 2021.

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Numbermatics. (2021). Number 21007 - Facts about the integer. Retrieved 7 March 2021, from https://numbermatics.com/n/21007/

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The information we have on file for 21007 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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