21038675840

Names of 21038675840

• Cardinal: 21038675840 can be written as Twenty-one billion, thirty-eight million, six hundred seventy-five thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.103867584 × 10¹⁰

Factors of 21038675840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 361268

Divisors of 21038675840

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 7 8 10 13 14 16 20 26 28 32 35 40 52 56 64 65 70 80 91 104 112 128 130 140 160 182 208 224 260 280 320 364 416 448 455 520 560 640 728 832 896 910 1040 1120 1456 1664 1820 2080 2240 2912 3640 4160 4480 5824 7280 8320 11648 14560 29120 58240 361241 722482 1444964 1806205 2528687 2889928 3612410 4696133 5057374 5779856 7224820 9392266 10114748 11559712 12643435 14449640 18784532 20229496 23119424 23480665 25286870 28899280 32872931 37569064 40458992 46238848 46961330 50573740 57798560 65745862 75138128 80917984 93922660 101147480 115597120 131491724 150276256 161835968 164364655 187845320 202294960 231194240 262983448 300552512 323671936 328729310 375690640 404589920 525966896 601105024 657458620 751381280 809179840 1051933792 1314917240 1502762560 1618359680 2103867584 2629834480 3005525120 4207735168 5259668960 10519337920 21038675840
• Sum of all divisors σ(n): 61902429120
• Sum of proper divisors (its aliquot sum) s(n): 40863753280
• 21038675840 is an abundant number, because the sum of its proper divisors (40863753280) is greater than itself. Its abundance is 19825077440

Bases of 21038675840

• Binary: 10011100110000000001011011110000000₂
• Hexadecimal: 0x4E600B780
• Base-36: 9NXVU68

Squares and roots of 21038675840

• 21038675840 squared (21038675840²) is 442625881100599705600
• 21038675840 cubed (21038675840³) is 9312262430869899635717832704000
• The square root of 21038675840 is 145047.1504028949
• The cube root of 21038675840 is 2760.6168473543

Scales and comparisons

• 21,038,675,840 seconds is equal to 668 years, 50 weeks, 1 day, 4 hours, 37 minutes, 20 seconds.
• To count from 1 to 21,038,675,840 would take you about one thousand, three hundred thirty-seven 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 21038675840 cubic inches would be around 230.1 feet tall.

Recreational maths with 21038675840

• 21038675840 backwards is 04857683012
• The number of decimal digits it has is: 11
• The sum of 21038675840's digits is 44
• More coming soon!