21009220128

Names of 21009220128

• Cardinal: 21009220128 can be written as Twenty-one billion, nine million, two hundred twenty thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1009220128 × 10¹⁰

Factors of 21009220128

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 91

Divisors of 21009220128

• Number of divisors d(n): 378
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 16 18 24 26 27 32 36 39 48 52 54 72 73 78 81 96 104 108 117 144 146 156 162 169 208 216 219 234 243 288 292 312 324 338 351 416 432 438 468 486 507 584 624 648 657 676 702 729 864 876 936 949 972 1014 1053 1168 1248 1296 1314 1352 1404 1458 1521 1752 1872 1898 1944 1971 2028 2106 2336 2592 2628 2704 2808 2847 2916 3042 3159 3504 3744 3796 3888 3942 4056 4212 4563 5256 5329 5408 5616 5694 5832 5913 6084 6318 7008 7592 7776 7884 8112 8424 8541 9126 9477 10512 10658 11232 11388 11664 11826 12168 12337 12636 13689 15184 15768 15987 16224 16848 17082 17739 18252 18954 21024 21316 22776 23328 23652 24336 24674 25272 25623 27378 30368 31536 31974 33696 34164 35478 36504 37011 37908 41067 42632 45552 47304 47961 48672 49348 50544 51246 53217 54756 63072 63948 68328 69277 70956 73008 74022 75816 76869 82134 85264 91104 94608 95922 98696 101088 102492 106434 109512 111033 123201 127896 136656 138554 141912 143883 146016 148044 151632 153738 164268 170528 189216 191844 197392 204984 207831 212868 219024 222066 230607 246402 255792 273312 277108 283824 287766 296088 303264 307476 328536 333099 383688 394784 409968 415662 425736 431649 438048 444132 461214 492804 511584 554216 567648 575532 592176 614952 623493 657072 666198 691821 767376 819936 831324 851472 863298 888264 900601 922428 985608 999297 1108432 1151064 1184352 1229904 1246986 1294947 1314144 1332396 1383642 1534752 1662648 1702944 1726596 1776528 1801202 1844856 1870479 1971216 1998594 2216864 2302128 2459808 2493972 2589894 2664792 2701803 2767284 2997891 3325296 3453192 3553056 3602404 3689712 3740958 3884841 3942432 3997188 4604256 4987944 5179788 5329584 5403606 5534568 5611437 5995782 6650592 6906384 7204808 7379424 7481916 7769682 7994376 8105409 8993673 9975888 10359576 10659168 10807212 11069136 11222874 11991564 13812768 14409616 14963832 15539364 15988752 16210818 16834311 17987346 19951776 20719152 21614424 22138272 22445748 23983128 24316227 28819232 29927664 31078728 31977504 32421636 33668622 35974692 41438304 43228848 44891496 47966256 48632454 50502933 59855328 62157456 64843272 67337244 71949384 72948681 86457696 89782992 95932512 97264908 101005866 124314912 129686544 134674488 143898768 145897362 179565984 194529816 202011732 218846043 259373088 269348976 287797536 291794724 389059632 404023464 437692086 538697952 583589448 656538129 778119264 808046928 875384172 1167178896 1313076258 1616093856 1750768344 2334357792 2626152516 3501536688 5252305032 7003073376 10504610064 21009220128
• Sum of all divisors σ(n): 68084267391
• Sum of proper divisors (its aliquot sum) s(n): 47075047263
• 21009220128 is an abundant number, because the sum of its proper divisors (47075047263) is greater than itself. Its abundance is 26065827135

Bases of 21009220128

• Binary: 10011100100001111110100001000100000₂
• Hexadecimal: 0x4E43F4220
• Base-36: 9NGCI00

Squares and roots of 21009220128

• 21009220128 squared (21009220128²) is 441387330386760336384
• 21009220128 cubed (21009220128³) is 9273203585805711283870783537152
• The square root of 21009220128 is 144945.5764347433
• The cube root of 21009220128 is 2759.3278892721

Scales and comparisons

• 21,009,220,128 seconds is equal to 668 years, 1 week, 3 days, 6 hours, 28 minutes, 48 seconds.
• To count from 1 to 21,009,220,128 would take you about one thousand, three hundred thirty-six 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 21009220128 cubic inches would be around 229.9 feet tall.

Recreational maths with 21009220128

• 21009220128 backwards is 82102290012
• 21009220128 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21009220128's digits is 27
• More coming soon!