18638981361

Names of 18638981361

• Cardinal: 18638981361 can be written as Eighteen billion, six hundred thirty-eight million, nine hundred eighty-one thousand, three hundred sixty-one.

Scientific notation

• Scientific notation: 1.8638981361 × 10¹⁰

Factors of 18638981361

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 199

Divisors of 18638981361

• Number of divisors d(n): 384
• Complete list of divisors:
  1 3 7 9 11 13 19 21 27 33 37 39 57 63 77 81 91 99 109 111 117 133 143 171 189 209 231 243 247 259 273 297 327 333 351 399 407 429 481 513 567 627 693 703 741 763 777 819 891 981 999 1001 1053 1197 1199 1221 1287 1417 1443 1463 1539 1701 1729 1881 2071 2079 2109 2223 2289 2331 2457 2673 2717 2849 2943 2997 3003 3159 3367 3591 3597 3663 3861 4033 4251 4329 4389 4617 4921 5187 5291 5643 6213 6237 6327 6669 6867 6993 7371 7733 8151 8393 8547 8829 8991 9009 9139 9919 10101 10773 10791 10989 11583 12099 12753 12987 13167 14497 14763 15561 15587 15873 16929 18639 18711 18981 19019 20007 20601 20979 22113 22781 23199 24453 25179 25641 26487 26923 27027 27417 28231 29757 30303 32319 32373 32967 34749 36297 37037 38259 38961 39501 43491 44289 44363 46683 46761 47619 50787 52429 54131 55917 56943 57057 60021 61803 62937 63973 68343 69597 73359 75537 76627 76923 80769 81081 82251 84693 89271 90909 97119 98901 100529 108891 109109 111111 114777 116883 118503 130473 132867 133089 140049 140283 142857 157287 159467 162393 167751 170829 171171 185409 188461 191919 205029 208791 220077 226611 229881 230769 242307 243243 246753 254079 267813 272727 291357 296153 301587 310541 326673 327327 333333 344331 355509 367003 391419 398601 399267 420147 420849 428571 471861 478401 487179 503253 513513 536389 565383 575757 576719 615087 626373 660231 679833 689643 692307 703703 726921 740259 762237 803439 818181 842897 888459 904761 931623 980019 981981 996151 999999 1101009 1174257 1195803 1197801 1262547 1285713 1415583 1435203 1461537 1540539 1609167 1696149 1727271 1730157 1845261 1879119 2039499 2068929 2073071 2111109 2180763 2220777 2286711 2410317 2528691 2665377 2714283 2794869 2945943 2988453 2999997 3303027 3522771 3593403 3787641 4037033 4246749 4305609 4384611 4621617 4827501 5088447 5181813 5190471 5535783 5900279 6206787 6219213 6333327 6542289 6860133 6973057 7586073 7996131 8142849 8384607 8837829 8965359 8999991 9909081 10780209 10957661 12111099 12740247 12916827 13153833 14482503 15265341 15545439 15571413 17700837 18620361 18657639 18999981 20919171 22758219 23988393 24428547 25153821 26513487 26896077 29727243 32872983 36333297 38750481 43447509 45796023 46714239 53102511 55972917 56999943 62757513 68274657 71965179 75461463 76703627 80688231 89181729 98618949 108999891 130342527 140142717 159307533 167918751 170999829 188272539 204823971 230110881 242064693 295856847 326999673 477922599 503756253 564817617 690332643 887570541 980999019 1433767797 1694452851 2070997929 2662711623 6212993787 18638981361
• Sum of all divisors σ(n): 40898457600
• Sum of proper divisors (its aliquot sum) s(n): 22259476239
• 18638981361 is an abundant number, because the sum of its proper divisors (22259476239) is greater than itself. Its abundance is 3620494878

Bases of 18638981361

• Binary: 10001010110111110000100100011110001₂
• Hexadecimal: 0x456F848F1
• Base-36: 8K96229

Squares and roots of 18638981361

• 18638981361 squared (18638981361²) is 347411626175705412321
• 18638981361 cubed (18638981361³) is 6475398824883672891277938748881
• The square root of 18638981361 is 136524.6547734145
• The cube root of 18638981361 is 2651.3927109591

Scales and comparisons

• 18,638,981,361 seconds is equal to 592 years, 34 weeks, 2 days, 22 hours, 49 minutes, 21 seconds.
• To count from 1 to 18,638,981,361 would take you about one thousand, one hundred eighty-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 18638981361 cubic inches would be around 220.9 feet tall.

Recreational maths with 18638981361

• 18638981361 backwards is 16318983681
• The number of decimal digits it has is: 11
• The sum of 18638981361's digits is 54
• More coming soon!