21397039

Names of 21397039

• Cardinal: 21397039 can be written as Twenty-one million, three hundred ninety-seven thousand and thirty-nine.

Scientific notation

• Scientific notation: 2.1397039 × 10⁷

Factors of 21397039

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 521920

Divisors of 21397039

• Number of divisors d(n): 4
• Complete list of divisors:
  1 41 521879 21397039
• Sum of all divisors σ(n): 21918960
• Sum of proper divisors (its aliquot sum) s(n): 521921
• 21397039 is a deficient number, because the sum of its proper divisors (521921) is less than itself. Its deficiency is 20875118

Bases of 21397039

• Binary: 1010001100111111000101111₂
• Hexadecimal: 0x1467E2F
• Base-36: CQM27

Squares and roots of 21397039

• 21397039 squared (21397039²) is 457833277967521
• 21397039 cubed (21397039³) is 9796276504168887570319
• The square root of 21397039 is 4625.6933534337
• The cube root of 21397039 is 277.6203044099

Scales and comparisons

• 21,397,039 seconds is equal to 35 weeks, 2 days, 15 hours, 37 minutes, 19 seconds.
• To count from 1 to 21,397,039 would take you about eleven 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 21397039 cubic inches would be around 23.1 feet tall.

Recreational maths with 21397039

• 21397039 backwards is 93079312
• The number of decimal digits it has is: 8
• The sum of 21397039's digits is 34
• More coming soon!