21051215136

Names of 21051215136

• Cardinal: 21051215136 can be written as Twenty-one billion, fifty-one million, two hundred fifteen thousand, one hundred thirty-six.

Scientific notation

• Scientific notation: 2.1051215136 × 10¹⁰

Factors of 21051215136

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 2085

Divisors of 21051215136

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 28 31 32 36 42 48 56 62 63 72 84 93 96 112 124 126 144 168 181 186 217 224 248 252 279 288 336 362 372 434 496 504 543 558 651 672 724 744 868 992 1008 1086 1116 1267 1302 1448 1488 1629 1736 1861 1953 2016 2172 2232 2534 2604 2896 2976 3258 3472 3722 3801 3906 4344 4464 5068 5208 5583 5611 5792 6516 6944 7444 7602 7812 8688 8928 10136 10416 11166 11222 11403 13027 13032 14888 15204 15624 16749 16833 17376 20272 20832 22332 22444 22806 26054 26064 29776 30408 31248 33498 33666 39081 39277 40544 44664 44888 45612 50499 52108 52128 57691 59552 60816 62496 66996 67332 78162 78554 89328 89776 91224 100998 104216 115382 117243 117831 121632 133992 134664 156324 157108 173073 178656 179552 182448 201996 208432 230764 234486 235662 267984 269328 312648 314216 336841 346146 353493 364896 403837 403992 416864 461528 468972 471324 519219 535968 538656 625296 628432 673682 692292 706986 807674 807984 923056 937944 942648 1010523 1038438 1211511 1250592 1256864 1347364 1384584 1413972 1615348 1615968 1846112 1875888 1885296 2021046 2076876 2357887 2423022 2694728 2769168 2827944 3031569 3230696 3634533 3751776 3770592 4042092 4153752 4715774 4846044 5389456 5538336 5655888 6063138 6461392 7073661 7269066 8084184 8307504 9431548 9692088 10442071 10778912 11311776 12126276 12922784 14147322 14538132 16168368 16615008 18863096 19384176 20884142 21220983 24252552 28294644 29076264 31326213 32336736 37726192 38768352 41768284 42441966 48505104 56589288 58152528 62652426 73094497 75452384 83536568 84883932 93978639 97010208 113178576 116305056 125304852 146188994 167073136 169767864 187957278 219283491 226357152 250609704 292377988 334146272 339535728 375914556 438566982 501219408 584755976 657850473 679071456 751829112 877133964 1002438816 1169511952 1315700946 1503658224 1754267928 2339023904 2631401892 3007316448 3508535856 5262803784 7017071712 10525607568 21051215136
• Sum of all divisors σ(n): 71051774976
• Sum of proper divisors (its aliquot sum) s(n): 50000559840
• 21051215136 is an abundant number, because the sum of its proper divisors (50000559840) is greater than itself. Its abundance is 28949344704

Bases of 21051215136

• Binary: 10011100110110000000000110100100000₂
• Hexadecimal: 0x4E6C00D20
• Base-36: 9O5CLK0

Squares and roots of 21051215136

• 21051215136 squared (21051215136²) is 443153658702155498496
• 21051215136 cubed (21051215136³) is 9328923007644593945764620435456
• The square root of 21051215136 is 145090.3688602383
• The cube root of 21051215136 is 2761.1651917007

Scales and comparisons

• 21,051,215,136 seconds is equal to 669 years, 18 weeks, 6 days, 7 hours, 45 minutes, 36 seconds.
• To count from 1 to 21,051,215,136 would take you about one thousand, three hundred thirty-eight 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 21051215136 cubic inches would be around 230.1 feet tall.

Recreational maths with 21051215136

• 21051215136 backwards is 63151215012
• The number of decimal digits it has is: 11
• The sum of 21051215136's digits is 27
• More coming soon!