21,147 is an odd composite number composed of four prime numbers multiplied together.

What does the number 21147 look like?

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

21147 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21147:

3 × 7 × 19 × 53

See below for interesting mathematical facts about the number 21147 from the Numbermatics database.

Names of 21147

  • Cardinal: 21147 can be written as Twenty-one thousand, one hundred forty-seven.

Scientific notation

  • Scientific notation: 2.1147 × 104

Factors of 21147

  • Number of distinct prime factors ω(n): 4
  • Total number of prime factors Ω(n): 4
  • Sum of prime factors: 82

Divisors of 21147

  • Number of divisors d(n): 16
  • Complete list of divisors:
  • Sum of all divisors σ(n): 34560
  • Sum of proper divisors (its aliquot sum) s(n): 13413
  • 21147 is a deficient number, because the sum of its proper divisors (13413) is less than itself. Its deficiency is 7734

Bases of 21147

  • Binary: 1010010100110112
  • Hexadecimal: 0x529B
  • Base-36: GBF

Squares and roots of 21147

  • 21147 squared (211472) is 447195609
  • 21147 cubed (211473) is 9456845543523
  • The square root of 21147 is 145.4200811441
  • The cube root of 21147 is 27.6534670345

Scales and comparisons

How big is 21147?
  • 21,147 seconds is equal to 5 hours, 52 minutes, 27 seconds.
  • To count from 1 to 21,147 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 21147 cubic inches would be around 2.3 feet tall.

Recreational maths with 21147

  • 21147 backwards is 74112
  • The number of decimal digits it has is: 5
  • The sum of 21147's digits is 15
  • More coming soon!

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The information we have on file for 21147 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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