21,730 is an even composite number composed of four prime numbers multiplied together.

What does the number 21730 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

21730 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21730:

2 × 5 × 41 × 53

See below for interesting mathematical facts about the number 21730 from the Numbermatics database.

Names of 21730

  • Cardinal: 21730 can be written as Twenty-one thousand, seven hundred thirty.

Scientific notation

  • Scientific notation: 2.173 × 104

Factors of 21730

  • Number of distinct prime factors ω(n): 4
  • Total number of prime factors Ω(n): 4
  • Sum of prime factors: 101

Divisors of 21730

  • Number of divisors d(n): 16
  • Complete list of divisors:
  • Sum of all divisors σ(n): 40824
  • Sum of proper divisors (its aliquot sum) s(n): 19094
  • 21730 is a deficient number, because the sum of its proper divisors (19094) is less than itself. Its deficiency is 2636

Bases of 21730

  • Binary: 1010100111000102
  • Hexadecimal: 0x54E2
  • Base-36: GRM

Squares and roots of 21730

  • 21730 squared (217302) is 472192900
  • 21730 cubed (217303) is 10260751717000
  • The square root of 21730 is 147.4109900923
  • The cube root of 21730 is 27.9052922649

Scales and comparisons

How big is 21730?
  • 21,730 seconds is equal to 6 hours, 2 minutes, 10 seconds.
  • To count from 1 to 21,730 would take you about six 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 21730 cubic inches would be around 2.3 feet tall.

Recreational maths with 21730

  • 21730 backwards is 03712
  • The number of decimal digits it has is: 5
  • The sum of 21730's digits is 13
  • More coming soon!

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The information we have on file for 21730 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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