21938993

Names of 21938993

• Cardinal: 21938993 can be written as Twenty-one million, nine hundred thirty-eight thousand, nine hundred ninety-three.

Scientific notation

• Scientific notation: 2.1938993 × 10⁷

Factors of 21938993

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 44547

Divisors of 21938993

• Number of divisors d(n): 8
• Complete list of divisors:
  1 17 29 493 44501 756517 1290529 21938993
• Sum of all divisors σ(n): 24031080
• Sum of proper divisors (its aliquot sum) s(n): 2092087
• 21938993 is a deficient number, because the sum of its proper divisors (2092087) is less than itself. Its deficiency is 19846906

Bases of 21938993

• Binary: 1010011101100001100110001₂
• Hexadecimal: 0x14EC331
• Base-36: D288H

Squares and roots of 21938993

• 21938993 squared (21938993²) is 481319413854049
• 21938993 cubed (21938993³) is 10559663251308084032657
• The square root of 21938993 is 4683.9078769763
• The cube root of 21938993 is 279.9446872031

Scales and comparisons

• 21,938,993 seconds is equal to 36 weeks, 1 day, 22 hours, 9 minutes, 53 seconds.
• To count from 1 to 21,938,993 would take you about two weeks!

  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 21938993 cubic inches would be around 23.3 feet tall.

Recreational maths with 21938993

• 21938993 backwards is 39983912
• The number of decimal digits it has is: 8
• The sum of 21938993's digits is 44
• More coming soon!