18,021 is an odd composite number composed of two prime numbers multiplied together.

What does the number 18021 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

18021 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 18021:

3 × 6007

See below for interesting mathematical facts about the number 18021 from the Numbermatics database.

Names of 18021

  • Cardinal: 18021 can be written as Eighteen thousand and twenty-one.

Scientific notation

  • Scientific notation: 1.8021 × 104

Factors of 18021

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 6010

Divisors of 18021

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 24032
  • Sum of proper divisors (its aliquot sum) s(n): 6011
  • 18021 is a deficient number, because the sum of its proper divisors (6011) is less than itself. Its deficiency is 12010

Bases of 18021

  • Binary: 1000110011001012
  • Hexadecimal: 0x4665
  • Base-36: DWL

Squares and roots of 18021

  • 18021 squared (180212) is 324756441
  • 18021 cubed (180213) is 5852435823261
  • The square root of 18021 is 134.2423182159
  • The cube root of 18021 is 26.2176017533

Scales and comparisons

How big is 18021?
  • 18,021 seconds is equal to 5 hours, 21 seconds.
  • To count from 1 to 18,021 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 18021 cubic inches would be around 2.2 feet tall.

Recreational maths with 18021

  • 18021 backwards is 12081
  • The number of decimal digits it has is: 5
  • The sum of 18021's digits is 12
  • More coming soon!

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"Number 18021 - Facts about the integer". Numbermatics.com. 2021. Web. 7 March 2021.

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The information we have on file for 18021 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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