21021425656

Names of 21021425656

• Cardinal: 21021425656 can be written as Twenty-one billion, twenty-one million, four hundred twenty-five thousand, six hundred fifty-six.

Scientific notation

• Scientific notation: 2.1021425656 × 10¹⁰

Factors of 21021425656

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 94570

Divisors of 21021425656

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 7 8 11 14 19 22 28 38 44 56 76 77 88 133 152 154 209 266 308 361 418 532 616 722 836 1064 1444 1463 1672 2527 2888 2926 3971 5054 5852 7942 10108 11704 15884 20216 27797 31768 55594 94531 111188 189062 222376 378124 661717 756248 1039841 1323434 1796089 2079682 2646868 3592178 4159364 5293736 7184356 7278887 8318728 12572623 14368712 14557774 19756979 25145246 29115548 34125691 39513958 50290492 58231096 68251382 79027916 100580984 136502764 138298853 158055832 238879837 273005528 276597706 375382601 477759674 553195412 750765202 955519348 1106390824 1501530404 1911038696 2627678207 3003060808 5255356414 10510712828 21021425656
• Sum of all divisors σ(n): 51864036480
• Sum of proper divisors (its aliquot sum) s(n): 30842610824
• 21021425656 is an abundant number, because the sum of its proper divisors (30842610824) is greater than itself. Its abundance is 9821185168

Bases of 21021425656

• Binary: 10011100100111110010111111111111000₂
• Hexadecimal: 0x4E4F97FF8
• Base-36: 9NNM3UG

Squares and roots of 21021425656

• 21021425656 squared (21021425656²) is 441900336610735030336
• 21021425656 cubed (21021425656³) is 9289375073423941451723128700416
• The square root of 21021425656 is 144987.6741519773
• The cube root of 21021425656 is 2759.8621393719

Scales and comparisons

• 21,021,425,656 seconds is equal to 668 years, 21 weeks, 4 days, 12 hours, 54 minutes, 16 seconds.
• To count from 1 to 21,021,425,656 would take you about one thousand, three hundred thirty-six years!

  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 21021425656 cubic inches would be around 230 feet tall.

Recreational maths with 21021425656

• 21021425656 backwards is 65652412012
• The number of decimal digits it has is: 11
• The sum of 21021425656's digits is 34
• More coming soon!