21056420

Names of 21056420

• Cardinal: 21056420 can be written as Twenty-one million, fifty-six thousand, four hundred twenty.

Scientific notation

• Scientific notation: 2.105642 × 10⁷

Factors of 21056420

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 138

Divisors of 21056420

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 7 10 11 14 20 22 28 35 44 55 70 77 110 113 121 140 154 220 226 242 308 385 452 484 565 605 770 791 847 1130 1210 1243 1331 1540 1582 1694 2260 2420 2486 2662 3164 3388 3955 4235 4972 5324 6215 6655 7910 8470 8701 9317 12430 13310 13673 15820 16940 17402 18634 24860 26620 27346 34804 37268 43505 46585 54692 68365 87010 93170 95711 136730 150403 174020 186340 191422 273460 300806 382844 478555 601612 752015 957110 1052821 1504030 1914220 2105642 3008060 4211284 5264105 10528210 21056420
• Sum of all divisors σ(n): 56077056
• Sum of proper divisors (its aliquot sum) s(n): 35020636
• 21056420 is an abundant number, because the sum of its proper divisors (35020636) is greater than itself. Its abundance is 13964216

Bases of 21056420

• Binary: 1010000010100101110100100₂
• Hexadecimal: 0x1414BA4
• Base-36: CJB8K

Squares and roots of 21056420

• 21056420 squared (21056420²) is 443372823216400
• 21056420 cubed (21056420³) is 9335844382230269288000
• The square root of 21056420 is 4588.7274924537
• The cube root of 21056420 is 276.1392736839

Scales and comparisons

• 21,056,420 seconds is equal to 34 weeks, 5 days, 17 hours, 20 seconds.
• To count from 1 to 21,056,420 would take you about thirteen 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 21056420 cubic inches would be around 23 feet tall.

Recreational maths with 21056420

• 21056420 backwards is 02465012
• 21056420 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21056420's digits is 20
• More coming soon!