21638

21,638 is an even composite number composed of three prime numbers multiplied together.

What does the number 21638 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

21638 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

Prime factorization of 21638:

2 × 31 × 349

See below for interesting mathematical facts about the number 21638 from the Numbermatics database.


Names of 21638

  • Cardinal: 21638 can be written as Twenty-one thousand, six hundred thirty-eight.

Scientific notation

  • Scientific notation: 2.1638 × 104

Factors of 21638

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 382

Divisors of 21638

  • Number of divisors d(n): 8
  • Complete list of divisors:
  • Sum of all divisors σ(n): 33600
  • Sum of proper divisors (its aliquot sum) s(n): 11962
  • 21638 is a deficient number, because the sum of its proper divisors (11962) is less than itself. Its deficiency is 9676

Bases of 21638

  • Binary: 1010100100001102
  • Hexadecimal: 0x5486
  • Base-36: GP2

Squares and roots of 21638

  • 21638 squared (216382) is 468203044
  • 21638 cubed (216383) is 10130977466072
  • The square root of 21638 is 147.0986063837
  • The cube root of 21638 is 27.8658549501

Scales and comparisons

How big is 21638?
  • 21,638 seconds is equal to 6 hours, 38 seconds.
  • To count from 1 to 21,638 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 21638 cubic inches would be around 2.3 feet tall.

Recreational maths with 21638

  • 21638 backwards is 83612
  • The number of decimal digits it has is: 5
  • The sum of 21638's digits is 20
  • More coming soon!

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"Number 21638 - Facts about the integer". Numbermatics.com. 2024. Web. 24 June 2024.

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Numbermatics. (2024). Number 21638 - Facts about the integer. Retrieved 24 June 2024, from https://numbermatics.com/n/21638/

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Numbermatics. 2024. "Number 21638 - Facts about the integer". https://numbermatics.com/n/21638/

The information we have on file for 21638 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 21638, math, Factors of 21638, curriculum, school, college, exams, university, Prime factorization of 21638, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, six hundred thirty-eight.

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