21,768 is an even composite number composed of three prime numbers multiplied together.

What does the number 21768 look like?

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

21768 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21768:

23 × 3 × 907

(2 × 2 × 2 × 3 × 907)

See below for interesting mathematical facts about the number 21768 from the Numbermatics database.

Names of 21768

  • Cardinal: 21768 can be written as Twenty-one thousand, seven hundred sixty-eight.

Scientific notation

  • Scientific notation: 2.1768 × 104

Factors of 21768

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 5
  • Sum of prime factors: 912

Divisors of 21768

  • Number of divisors d(n): 16
  • Complete list of divisors:
  • Sum of all divisors σ(n): 54480
  • Sum of proper divisors (its aliquot sum) s(n): 32712
  • 21768 is an abundant number, because the sum of its proper divisors (32712) is greater than itself. Its abundance is 10944

Bases of 21768

  • Binary: 1010101000010002
  • Hexadecimal: 0x5508
  • Base-36: GSO

Squares and roots of 21768

  • 21768 squared (217682) is 473845824
  • 21768 cubed (217683) is 10314675896832
  • The square root of 21768 is 147.5398251321
  • The cube root of 21768 is 27.9215491075

Scales and comparisons

How big is 21768?
  • 21,768 seconds is equal to 6 hours, 2 minutes, 48 seconds.
  • To count from 1 to 21,768 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 21768 cubic inches would be around 2.3 feet tall.

Recreational maths with 21768

  • 21768 backwards is 86712
  • 21768 is a Harshad number.
  • The number of decimal digits it has is: 5
  • The sum of 21768's digits is 24
  • More coming soon!

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The information we have on file for 21768 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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