21215537904

Names of 21215537904

• Cardinal: 21215537904 can be written as Twenty-one billion, two hundred fifteen million, five hundred thirty-seven thousand, nine hundred four.

Scientific notation

• Scientific notation: 2.1215537904 × 10¹⁰

Factors of 21215537904

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 110

Divisors of 21215537904

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 8 11 12 16 22 24 33 41 44 48 53 66 82 88 106 121 123 132 159 164 176 212 242 246 264 318 328 363 424 451 484 492 528 583 636 656 726 848 902 968 984 1166 1272 1353 1452 1681 1749 1804 1936 1968 2173 2332 2544 2706 2904 3362 3498 3608 4346 4664 4961 5043 5412 5808 6413 6519 6724 6996 7216 8692 9328 9922 10086 10824 12826 13038 13448 13992 14883 17384 18491 19239 19844 20172 21648 23903 25652 26076 26896 27984 29766 34768 36982 38478 39688 40344 47806 51304 52152 55473 59532 68921 71709 73964 76956 79376 80688 89093 95612 102608 104304 110946 119064 137842 143418 147928 153912 178186 191224 203401 206763 221892 238128 262933 267279 275684 286836 295856 307824 356372 382448 406802 413526 443784 525866 534558 551368 573672 610203 712744 758131 788799 813604 827052 887568 980023 1051732 1069116 1102736 1147344 1220406 1425488 1516262 1577598 1627208 1654104 1960046 2103464 2138232 2274393 2440812 2940069 3032524 3155196 3254416 3308208 3652813 3920092 4206928 4276464 4548786 4881624 5880138 6065048 6310392 7305626 7840184 8339441 9097572 9763248 10780253 10958439 11760276 12130096 12620784 14611252 15680368 16678882 18195144 21560506 21916878 23520552 25018323 29222504 32340759 33357764 36390288 40180943 43121012 43833756 47041104 50036646 58445008 64681518 66715528 80361886 86242024 87667512 100073292 120542829 129363036 133431056 160723772 172484048 175335024 200146584 241085658 258726072 321447544 400293168 441990373 482171316 517452144 642895088 883980746 964342632 1325971119 1767961492 1928685264 2651942238 3535922984 5303884476 7071845968 10607768952 21215537904
• Sum of all divisors σ(n): 62913285792
• Sum of proper divisors (its aliquot sum) s(n): 41697747888
• 21215537904 is an abundant number, because the sum of its proper divisors (41697747888) is greater than itself. Its abundance is 20482209984

Bases of 21215537904

• Binary: 10011110000100010110110101011110000₂
• Hexadecimal: 0x4F08B6AF0
• Base-36: 9QV6LTC

Squares and roots of 21215537904

• 21215537904 squared (21215537904²) is 450099048556060713216
• 21215537904 cubed (21215537904³) is 9549093425195442530159321739264
• The square root of 21215537904 is 145655.5453939191
• The cube root of 21215537904 is 2768.3309987359

Scales and comparisons

• 21,215,537,904 seconds is equal to 674 years, 30 weeks, 4 days, 4 hours, 58 minutes, 24 seconds.
• To count from 1 to 21,215,537,904 would take you about one thousand, three hundred forty-nine 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 21215537904 cubic inches would be around 230.7 feet tall.

Recreational maths with 21215537904

• 21215537904 backwards is 40973551212
• The number of decimal digits it has is: 11
• The sum of 21215537904's digits is 39
• More coming soon!