21132781740

Names of 21132781740

• Cardinal: 21132781740 can be written as Twenty-one billion, one hundred thirty-two million, seven hundred eighty-one thousand, seven hundred forty.

Scientific notation

• Scientific notation: 2.113278174 × 10¹⁰

Factors of 21132781740

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 88758

Divisors of 21132781740

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 27 28 30 35 36 42 45 49 54 60 63 70 81 84 90 98 105 108 126 135 140 147 162 180 189 196 210 243 245 252 270 294 315 324 378 405 420 441 486 490 540 567 588 630 735 756 810 882 945 972 980 1134 1215 1260 1323 1470 1620 1701 1764 1890 2205 2268 2430 2646 2835 2940 3402 3780 3969 4410 4860 5292 5670 6615 6804 7938 8505 8820 11340 11907 13230 15876 17010 19845 23814 26460 34020 39690 47628 59535 79380 88741 119070 177482 238140 266223 354964 443705 532446 621187 798669 887410 1064892 1242374 1331115 1597338 1774820 1863561 2396007 2484748 2662230 3105935 3194676 3727122 3993345 4348309 4792014 5324460 5590683 6211870 7188021 7454244 7986690 8696618 9317805 9584028 11181366 11980035 12423740 13044927 14376042 15973380 16772049 17393236 18635610 21564063 21741545 22362732 23960070 26089854 27953415 28752084 33544098 35940105 37271220 39134781 43128126 43483090 47920140 50316147 52179708 55906830 65224635 67088196 71880210 78269562 83860245 86256252 86966180 100632294 107820315 111813660 117404343 130449270 143760420 150948441 156539124 167720490 195673905 201264588 215640630 234808686 251580735 260898540 301896882 335440980 352213029 391347810 431281260 469617372 503161470 587021715 603793764 704426058 754742205 782695620 1006322940 1056639087 1174043430 1408852116 1509484410 1761065145 2113278174 2348086860 3018968820 3522130290 4226556348 5283195435 7044260580 10566390870 21132781740
• Sum of all divisors σ(n): 77331198672
• Sum of proper divisors (its aliquot sum) s(n): 56198416932
• 21132781740 is an abundant number, because the sum of its proper divisors (56198416932) is greater than itself. Its abundance is 35065635192

Bases of 21132781740

• Binary: 10011101011100111001010100010101100₂
• Hexadecimal: 0x4EB9CA8AC
• Base-36: 9PHWUR0

Squares and roots of 21132781740

• 21132781740 squared (21132781740²) is 446594464070477427600
• 21132781740 cubed (21132781740³) is 9437783335493671455067452024000
• The square root of 21132781740 is 145371.1860720687
• The cube root of 21132781740 is 2764.7268009727

Scales and comparisons

• 21,132,781,740 seconds is equal to 671 years, 49 weeks, 5 days, 9 hours, 9 minutes.
• To count from 1 to 21,132,781,740 would take you about one thousand, three hundred forty-three 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 21132781740 cubic inches would be around 230.4 feet tall.

Recreational maths with 21132781740

• 21132781740 backwards is 04718723112
• 21132781740 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21132781740's digits is 36
• More coming soon!