21005925840

Names of 21005925840

• Cardinal: 21005925840 can be written as Twenty-one billion, five million, nine hundred twenty-five thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.100592584 × 10¹⁰

Factors of 21005925840

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 2189

Divisors of 21005925840

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 36 40 45 48 60 61 72 80 90 120 122 144 180 183 240 244 257 305 360 366 488 514 549 610 720 732 771 915 976 1028 1098 1220 1285 1464 1542 1830 1861 2056 2196 2313 2440 2570 2745 2928 3084 3660 3722 3855 4112 4392 4626 4880 5140 5490 5583 6168 7320 7444 7710 8784 9252 9305 10280 10980 11166 11565 12336 14640 14888 15420 15677 16749 18504 18610 20560 21960 22332 23130 27915 29776 30840 31354 33498 37008 37220 43920 44664 46260 47031 55830 61680 62708 66996 74440 78385 83745 89328 92520 94062 111660 113521 125416 133992 141093 148880 156770 167490 185040 188124 223320 227042 235155 250832 267984 282186 313540 334980 340563 376248 446640 454084 470310 478277 564372 567605 627080 669960 681126 705465 752496 908168 940620 956554 1021689 1128744 1135210 1254160 1339920 1362252 1410930 1434831 1702815 1816336 1881240 1913108 2043378 2257488 2270420 2391385 2724504 2821860 2869662 3405630 3762480 3826216 4086756 4304493 4540840 4782770 5108445 5449008 5643720 5739324 6811260 7174155 7652432 8173512 8608986 9081680 9565540 10216890 11287440 11478648 13622520 14348310 16347024 17217972 19131080 20433780 21522465 22957296 27245040 28696620 29174897 34435944 38262160 40867560 43044930 57393240 58349794 68871888 81735120 86089860 87524691 114786480 116699588 145874485 172179720 175049382 233399176 262574073 291748970 344359440 350098764 437623455 466798352 525148146 583497940 700197528 875246910 1050296292 1166995880 1312870365 1400395056 1750493820 2100592584 2333991760 2625740730 3500987640 4201185168 5251481460 7001975280 10502962920 21005925840
• Sum of all divisors σ(n): 72019046736
• Sum of proper divisors (its aliquot sum) s(n): 51013120896
• 21005925840 is an abundant number, because the sum of its proper divisors (51013120896) is greater than itself. Its abundance is 30007195056

Bases of 21005925840

• Binary: 10011100100000011001111110111010000₂
• Hexadecimal: 0x4E40CFDD0
• Base-36: 9NEDW40

Squares and roots of 21005925840

• 21005925840 squared (21005925840²) is 441248920395579705600
• 21005925840 cubed (21005925840³) is 9268842098809610759642632704000
• The square root of 21005925840 is 144934.2121101847
• The cube root of 21005925840 is 2759.1836590111

Scales and comparisons

• 21,005,925,840 seconds is equal to 667 years, 48 weeks, 3 hours, 24 minutes.
• To count from 1 to 21,005,925,840 would take you about one thousand, three hundred thirty-five 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 21005925840 cubic inches would be around 229.9 feet tall.

Recreational maths with 21005925840

• 21005925840 backwards is 04852950012
• 21005925840 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21005925840's digits is 36
• More coming soon!