21,357 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21357 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 16 divisors.

21357 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21357:

33 × 7 × 113

(3 × 3 × 3 × 7 × 113)

See below for interesting mathematical facts about the number 21357 from the Numbermatics database.

Names of 21357

  • Cardinal: 21357 can be written as Twenty-one thousand, three hundred fifty-seven.

Scientific notation

  • Scientific notation: 2.1357 × 104

Factors of 21357

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 5
  • Sum of prime factors: 123

Divisors of 21357

  • Number of divisors d(n): 16
  • Complete list of divisors:
  • Sum of all divisors σ(n): 36480
  • Sum of proper divisors (its aliquot sum) s(n): 15123
  • 21357 is a deficient number, because the sum of its proper divisors (15123) is less than itself. Its deficiency is 6234

Bases of 21357

  • Binary: 1010011011011012
  • Hexadecimal: 0x536D
  • Base-36: GH9

Squares and roots of 21357

  • 21357 squared (213572) is 456121449
  • 21357 cubed (213573) is 9741385786293
  • The square root of 21357 is 146.1403435059
  • The cube root of 21357 is 27.7447031527

Scales and comparisons

How big is 21357?
  • 21,357 seconds is equal to 5 hours, 55 minutes, 57 seconds.
  • To count from 1 to 21,357 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 21357 cubic inches would be around 2.3 feet tall.

Recreational maths with 21357

  • 21357 backwards is 75312
  • The number of decimal digits it has is: 5
  • The sum of 21357's digits is 18
  • More coming soon!

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"Number 21357 - Facts about the integer". Numbermatics.com. 2022. Web. 21 January 2022.

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Numbermatics. (2022). Number 21357 - Facts about the integer. Retrieved 21 January 2022, from https://numbermatics.com/n/21357/

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The information we have on file for 21357 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!

Keywords: Divisors of 21357, math, Factors of 21357, curriculum, school, college, exams, university, Prime factorization of 21357, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, three hundred fifty-seven.

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