21980

21,980 is an even composite number composed of four prime numbers multiplied together.

What does the number 21980 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 24 divisors.

21980 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of twenty-four divisors.

Prime factorization of 21980:

22 × 5 × 7 × 157

(2 × 2 × 5 × 7 × 157)

See below for interesting mathematical facts about the number 21980 from the Numbermatics database.


Names of 21980

  • Cardinal: 21980 can be written as Twenty-one thousand, nine hundred eighty.

Scientific notation

  • Scientific notation: 2.198 × 104

Factors of 21980

  • Number of distinct prime factors ω(n): 4
  • Total number of prime factors Ω(n): 5
  • Sum of prime factors: 171

Divisors of 21980

Bases of 21980

  • Binary: 1010101110111002
  • Hexadecimal: 0x55DC
  • Base-36: GYK

Squares and roots of 21980

  • 21980 squared (219802) is 483120400
  • 21980 cubed (219803) is 10618986392000
  • The square root of 21980 is 148.2565344259
  • The cube root of 21980 is 28.0118997041

Scales and comparisons

How big is 21980?
  • 21,980 seconds is equal to 6 hours, 6 minutes, 20 seconds.
  • To count from 1 to 21,980 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 21980 cubic inches would be around 2.3 feet tall.

Recreational maths with 21980

  • 21980 backwards is 08912
  • 21980 is a Harshad number.
  • The number of decimal digits it has is: 5
  • The sum of 21980's digits is 20
  • More coming soon!

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"Number 21980 - Facts about the integer". Numbermatics.com. 2024. Web. 29 March 2024.

APA style:
Numbermatics. (2024). Number 21980 - Facts about the integer. Retrieved 29 March 2024, from https://numbermatics.com/n/21980/

Chicago style:
Numbermatics. 2024. "Number 21980 - Facts about the integer". https://numbermatics.com/n/21980/

The information we have on file for 21980 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 21980, math, Factors of 21980, curriculum, school, college, exams, university, Prime factorization of 21980, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, nine hundred eighty.

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