18720

18,720 is an even composite number composed of four prime numbers multiplied together.

What does the number 18720 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 72 divisors.

18720 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of seventy-two divisors.

Prime factorization of 18720:

25 × 32 × 5 × 13

(2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 13)

See below for interesting mathematical facts about the number 18720 from the Numbermatics database.


Names of 18720

  • Cardinal: 18720 can be written as Eighteen thousand, seven hundred twenty.

Scientific notation

  • Scientific notation: 1.872 × 104

Factors of 18720

  • Number of distinct prime factors ω(n): 4
  • Total number of prime factors Ω(n): 9
  • Sum of prime factors: 23

Divisors of 18720

Bases of 18720

  • Binary: 1001001001000002
  • Hexadecimal: 0x4920
  • Base-36: EG0

Squares and roots of 18720

  • 18720 squared (187202) is 350438400
  • 18720 cubed (187203) is 6560206848000
  • The square root of 18720 is 136.8210510119
  • The cube root of 18720 is 26.5522878853

Scales and comparisons

How big is 18720?
  • 18,720 seconds is equal to 5 hours, 12 minutes.
  • To count from 1 to 18,720 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 18720 cubic inches would be around 2.2 feet tall.

Recreational maths with 18720

  • 18720 backwards is 02781
  • 18720 is a Harshad number.
  • The number of decimal digits it has is: 5
  • The sum of 18720's digits is 18
  • More coming soon!

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"Number 18720 - Facts about the integer". Numbermatics.com. 2020. Web. 14 August 2020.

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Numbermatics. (2020). Number 18720 - Facts about the integer. Retrieved 14 August 2020, from https://numbermatics.com/n/18720/

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The information we have on file for 18720 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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