21023730

Names of 21023730

• Cardinal: 21023730 can be written as Twenty-one million, twenty-three thousand, seven hundred thirty.

Scientific notation

• Scientific notation: 2.102373 × 10⁷

Factors of 21023730

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 198

Divisors of 21023730

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 7 9 10 13 14 15 17 18 21 26 30 34 35 39 42 45 51 63 65 70 78 85 90 91 102 105 117 119 126 130 151 153 170 182 195 210 221 234 238 255 273 302 306 315 357 390 442 453 455 510 546 585 595 630 663 714 755 765 819 906 910 1057 1071 1105 1170 1190 1326 1359 1365 1510 1530 1547 1638 1785 1963 1989 2114 2142 2210 2265 2567 2718 2730 3094 3171 3315 3570 3926 3978 4095 4530 4641 5134 5285 5355 5889 6342 6630 6795 7701 7735 8190 9282 9513 9815 9945 10570 10710 11778 12835 13590 13741 13923 15402 15470 15855 17667 17969 19026 19630 19890 23103 23205 25670 27482 27846 29445 31710 33371 35334 35938 38505 41223 46206 46410 47565 53907 58890 66742 68705 69615 77010 82446 88335 89845 95130 100113 107814 115515 123669 137410 139230 161721 166855 176670 179690 200226 206115 231030 233597 247338 269535 300339 323442 333710 412230 467194 500565 539070 600678 618345 700791 808605 1001130 1167985 1236690 1401582 1501695 1617210 2102373 2335970 3003390 3503955 4204746 7007910 10511865 21023730
• Sum of all divisors σ(n): 71705088
• Sum of proper divisors (its aliquot sum) s(n): 50681358
• 21023730 is an abundant number, because the sum of its proper divisors (50681358) is greater than itself. Its abundance is 29657628

Bases of 21023730

• Binary: 1010000001100101111110010₂
• Hexadecimal: 0x140CBF2
• Base-36: CIM0I

Squares and roots of 21023730

• 21023730 squared (21023730²) is 441997223112900
• 21023730 cubed (21023730³) is 9292430279475369117000
• The square root of 21023730 is 4585.1641192001
• The cube root of 21023730 is 275.9962979969

Scales and comparisons

• 21,023,730 seconds is equal to 34 weeks, 5 days, 7 hours, 55 minutes, 30 seconds.
• To count from 1 to 21,023,730 would take you about twenty-three 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 21023730 cubic inches would be around 23 feet tall.

Recreational maths with 21023730

• 21023730 backwards is 03732012
• 21023730 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21023730's digits is 18
• More coming soon!