20921218164

Names of 20921218164

• Cardinal: 20921218164 can be written as Twenty billion, nine hundred twenty-one million, two hundred eighteen thousand, one hundred sixty-four.

Scientific notation

• Scientific notation: 2.0921218164 × 10¹⁰

Factors of 20921218164

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 69

Divisors of 20921218164

• Number of divisors d(n): 720
• Complete list of divisors:
  1 2 3 4 6 7 9 11 12 14 17 18 21 22 27 28 29 33 34 36 42 44 49 51 54 58 63 66 68 77 81 84 87 98 99 102 108 116 119 126 132 147 153 154 162 174 187 189 196 198 203 204 231 238 243 252 261 294 297 306 308 319 324 348 357 374 378 396 406 441 459 462 476 486 493 522 539 561 567 588 594 609 612 638 693 714 729 748 756 783 812 833 882 891 918 924 957 972 986 1044 1071 1078 1122 1134 1188 1218 1276 1309 1323 1377 1386 1421 1428 1458 1479 1566 1617 1666 1683 1701 1764 1782 1827 1836 1914 1972 2079 2142 2156 2187 2233 2244 2268 2349 2436 2499 2618 2646 2673 2754 2772 2842 2871 2916 2958 3132 3213 3234 3332 3366 3402 3451 3564 3654 3828 3927 3969 4131 4158 4263 4284 4374 4437 4466 4698 4851 4998 5049 5103 5236 5292 5346 5423 5481 5508 5684 5742 5916 6237 6426 6468 6561 6699 6732 6804 6902 7047 7308 7497 7854 7938 8019 8262 8316 8526 8613 8748 8874 8932 9163 9396 9639 9702 9996 10098 10206 10353 10692 10846 10962 11484 11781 11907 12393 12474 12789 12852 13122 13311 13398 13804 14094 14553 14994 15147 15309 15631 15708 15876 16038 16269 16443 16524 17052 17226 17748 18326 18711 19278 19404 19683 20097 20196 20412 20706 21141 21692 21924 22491 23562 23814 24057 24157 24786 24948 25578 25839 26244 26622 26796 27489 28188 28917 29106 29988 30294 30618 31059 31262 32076 32538 32886 34452 35343 35721 36652 37179 37422 37961 38367 38556 39366 39933 40194 41412 42282 43659 44982 45441 45927 46893 47124 47628 48114 48314 48807 49329 49572 51156 51678 53244 54978 56133 57834 58212 60291 60588 61236 62118 62524 63423 65076 65772 67473 70686 71442 72171 72471 74358 74844 75922 76734 77517 78732 79866 80388 82467 84564 86751 87318 89964 90882 91854 93177 93786 96228 96628 97614 98658 103356 106029 107163 109956 111537 112266 113883 115101 115668 119799 120582 124236 126846 130977 134946 136323 137781 140679 141372 142884 144342 144942 146421 147987 148716 151844 153468 155034 159732 164934 168399 173502 174636 180873 181764 183708 186354 187572 190269 195228 197316 202419 212058 214326 216513 217413 223074 224532 227766 230202 232551 239598 241164 247401 253692 260253 261954 265727 269892 272646 275562 279531 281358 288684 289884 292842 295974 310068 318087 321489 329868 334611 336798 341649 345303 347004 359397 361746 372708 380538 392931 404838 408969 422037 424116 428652 433026 434826 439263 443961 446148 455532 460404 465102 479196 494802 505197 520506 523908 531454 542619 545292 551124 559062 562716 570807 585684 591948 607257 636174 642978 652239 669222 673596 683298 690606 697653 718794 723492 742203 761076 780759 785862 797181 809676 817938 838593 844074 866052 869652 878526 887922 930204 954261 964467 989604 1010394 1024947 1035909 1041012 1062908 1078191 1085238 1118124 1141614 1178793 1214514 1226907 1266111 1272348 1285956 1304478 1317789 1331883 1338444 1366596 1381212 1395306 1437588 1484406 1515591 1561518 1571724 1594362 1627857 1635876 1677186 1688148 1757052 1775844 1821771 1908522 1928934 1956717 2020788 2049894 2071818 2092959 2156382 2170476 2226609 2283228 2342277 2357586 2391543 2429028 2453814 2515779 2532222 2608956 2635578 2663766 2790612 2862783 2968812 3031182 3074841 3107727 3123036 3188724 3234573 3255714 3354372 3536379 3643542 3680721 3798333 3817044 3857868 3913434 3953367 3995649 4099788 4143636 4185918 4312764 4453218 4684554 4715172 4783086 4883571 4907628 5031558 5064444 5271156 5327532 5465313 5725566 5870151 6062364 6149682 6215454 6278877 6469146 6511428 6679827 7072758 7174629 7287084 7361442 7547337 7596666 7826868 7906734 7991298 8371836 8588349 8906436 9224523 9323181 9369108 9566172 9703719 9767142 10063116 10609137 10930626 11394999 11451132 11740302 11860101 12299364 12430908 12557754 12938292 13359654 14145516 14349258 14650713 14722884 15094674 15193332 15813468 15982596 16395939 17176698 17610453 18449046 18646362 19407438 19534284 20039481 21218274 21523887 21861252 22642011 22789998 23480604 23720202 25115508 25765047 26719308 27673569 27969543 28698516 29301426 30189348 32791878 34184997 34353396 35220906 35580303 36898092 37292724 38814876 40078962 42436548 43047774 43952139 45284022 45579996 47440404 51530094 52831359 55347138 55939086 58602852 60118443 64571661 65583756 67926033 68369994 70441812 71160606 80157924 83020707 86095548 87904278 90568044 102554991 103060188 105662718 106740909 110694276 111878172 120236886 129143322 135852066 136739988 142321212 158494077 166041414 175808556 180355329 193714983 205109982 211325436 213481818 240473772 249062121 258286644 271704132 307664973 316988154 332082828 360710658 387429966 410219964 426963636 475482231 498124242 581144949 615329946 633976308 721421316 747186363 774859932 950964462 996248484 1162289898 1230659892 1494372726 1743434847 1901928924 2324579796 2988745452 3486869694 5230304541 6973739388 10460609082 20921218164
• Sum of all divisors σ(n): 76334892480
• Sum of proper divisors (its aliquot sum) s(n): 55413674316
• 20921218164 is an abundant number, because the sum of its proper divisors (55413674316) is greater than itself. Its abundance is 34492456152

Bases of 20921218164

• Binary: 10011011111000000000111010001110100₂
• Hexadecimal: 0x4DF007474
• Base-36: 9LZYB90

Squares and roots of 20921218164

• 20921218164 squared (20921218164²) is 437697369465683530896
• 20921218164 cubed (20921218164³) is 9157162156400477261257050394944
• The square root of 20921218164 is 144641.6888867107
• The cube root of 20921218164 is 2755.4698036649

Scales and comparisons

• 20,921,218,164 seconds is equal to 665 years, 11 weeks, 6 days, 17 hours, 29 minutes, 24 seconds.
• To count from 1 to 20,921,218,164 would take you about one thousand, three hundred thirty 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 20921218164 cubic inches would be around 229.6 feet tall.

Recreational maths with 20921218164

• 20921218164 backwards is 46181212902
• 20921218164 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 20921218164's digits is 36
• More coming soon!