21645387940160

Names of 21645387940160

• Cardinal: 21645387940160 can be written as Twenty-one trillion, six hundred forty-five billion, three hundred eighty-seven million, nine hundred forty thousand, one hundred sixty.

Scientific notation

• Scientific notation: 2.164538794016 × 10¹³

Factors of 21645387940160

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 297

Divisors of 21645387940160

• Number of divisors d(n): 168
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 64 80 97 160 193 194 320 386 388 485 772 776 965 970 1544 1552 1930 1940 3088 3104 3860 3880 6176 6208 7720 7760 9409 12352 15440 15520 18721 18818 30880 31040 37249 37442 37636 47045 61760 74498 74884 75272 93605 94090 148996 149768 150544 186245 187210 188180 297992 299536 301088 372490 374420 376360 595984 599072 602176 744980 748840 752720 1191968 1198144 1489960 1497680 1505440 1815937 2383936 2979920 2995360 3010880 3613153 3631874 5959840 5990720 7189057 7226306 7263748 9079685 11919680 14378114 14452612 14527496 18065765 18159370 28756228 28905224 29054992 35945285 36131530 36318740 57512456 57810448 58109984 71890570 72263060 72637480 115024912 115620896 116219968 143781140 144526120 145274960 230049824 231241792 287562280 289052240 290549920 350475841 460099648 575124560 578104480 581099840 697338529 700951682 1150249120 1156208960 1394677058 1401903364 1752379205 2300498240 2789354116 2803806728 3486692645 3504758410 5578708232 5607613456 6973385290 7009516820 11157416464 11215226912 13946770580 14019033640 22314832928 22430453824 27893541160 28038067280 44629665856 55787082320 56076134560 67641837313 111574164640 112152269120 135283674626 223148329280 270567349252 338209186565 541134698504 676418373130 1082269397008 1352836746260 2164538794016 2705673492520 4329077588032 5411346985040 10822693970080 21645387940160
• Sum of all divisors σ(n): 52351179651000
• Sum of proper divisors (its aliquot sum) s(n): 30705791710840
• 21645387940160 is an abundant number, because the sum of its proper divisors (30705791710840) is greater than itself. Its abundance is 9060403770680

Bases of 21645387940160

• Binary: 100111010111110110101101010001100000101000000₂
• Hexadecimal: 0x13AFB5A8C140
• Base-36: 7O7R541FK

Squares and roots of 21645387940160

• 21645387940160 squared (21645387940160²) is 468522819080023967740825600
• 21645387940160 cubed (21645387940160³) is 10141358177804516337301019322721796096000
• The square root of 21645387940160 is 4652460.4179036279
• The cube root of 21645387940160 is 27869.0260356491

Scales and comparisons

• 21,645,387,940,160 seconds is equal to 688,256 years, 19 weeks, 6 days, 9 hours, 9 minutes, 20 seconds.
• To count from 1 to 21,645,387,940,160 would take you about one million, seven hundred twenty thousand, six hundred forty 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 21645387940160 cubic inches would be around 2322.4 feet tall.

Recreational maths with 21645387940160

• 21645387940160 backwards is 06104978354612
• The number of decimal digits it has is: 14
• The sum of 21645387940160's digits is 56
• More coming soon!