21128151440

Names of 21128151440

• Cardinal: 21128151440 can be written as Twenty-one billion, one hundred twenty-eight million, one hundred fifty-one thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.112815144 × 10¹⁰

Factors of 21128151440

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 484

Divisors of 21128151440

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 23 37 40 44 46 55 74 80 88 89 92 110 115 148 176 178 184 185 220 230 253 296 317 356 368 370 407 440 445 460 506 592 634 712 740 814 851 880 890 920 979 1012 1265 1268 1424 1480 1585 1628 1702 1780 1840 1958 2024 2035 2047 2530 2536 2960 3170 3256 3293 3404 3487 3560 3916 4048 4070 4094 4255 4895 5060 5072 6340 6512 6586 6808 6974 7120 7291 7832 8140 8188 8510 9361 9790 10120 10235 11729 12680 13172 13616 13948 14582 15664 16280 16376 16465 17020 17435 18722 19580 20240 20470 22517 23458 25360 26344 27896 28213 29164 32560 32752 32930 34040 34870 36223 36455 37444 39160 40940 45034 46805 46916 52688 55792 56426 58328 58645 65860 68080 69740 72446 72910 74888 75739 78320 80201 81880 90068 93610 93832 112585 112852 116656 117290 129019 131720 139480 141065 144892 145820 149776 151478 160402 163760 180136 181115 187220 187664 225170 225704 234580 258038 263440 269767 278960 282130 289784 291640 302956 310343 320804 360272 362230 374440 378695 401005 450340 451408 469160 516076 539534 564260 579568 583280 605912 620686 641608 645095 648899 724460 748880 757390 802010 833129 900680 938320 1032152 1043881 1079068 1128520 1211824 1241372 1283216 1290190 1297798 1348835 1448920 1514780 1551715 1604020 1666258 1801360 2064304 2087762 2158136 2257040 2482744 2580380 2595596 2697670 2897840 2967437 3029560 3103430 3208040 3244495 3332516 4165645 4175524 4316272 4965488 5160760 5191192 5219405 5395340 5934874 6059120 6206860 6416080 6488990 6665032 7137889 8331290 8351048 10321520 10382384 10438810 10790680 11482691 11869748 12413720 12977980 13330064 14275778 14837185 16662580 16702096 20877620 21581360 22965382 23739496 24009263 24827440 25955960 28551556 29674370 33325160 35689445 41755240 45930764 47478992 48018526 51911920 57103112 57413455 59348740 66650320 71378890 83510480 91861528 96037052 114206224 114826910 118697480 120046315 142757780 183723056 192074104 229653820 237394960 240092630 264101893 285515560 384148208 459307640 480185260 528203786 571031120 918615280 960370520 1056407572 1320509465 1920741040 2112815144 2641018930 4225630288 5282037860 10564075720 21128151440
• Sum of all divisors σ(n): 58258414080
• Sum of proper divisors (its aliquot sum) s(n): 37130262640
• 21128151440 is an abundant number, because the sum of its proper divisors (37130262640) is greater than itself. Its abundance is 16002111200

Bases of 21128151440

• Binary: 10011101011010101100000000110010000₂
• Hexadecimal: 0x4EB560190
• Base-36: 9PF5LZK

Squares and roots of 21128151440

• 21128151440 squared (21128151440²) is 446398783271574073600
• 21128151440 cubed (21128151440³) is 9431581095593555674198505984000
• The square root of 21128151440 is 145355.2594163693
• The cube root of 21128151440 is 2764.5248643207

Scales and comparisons

• 21,128,151,440 seconds is equal to 671 years, 42 weeks, 18 hours, 57 minutes, 20 seconds.
• To count from 1 to 21,128,151,440 would take you about one thousand, three hundred forty-three 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 21128151440 cubic inches would be around 230.4 feet tall.

Recreational maths with 21128151440

• 21128151440 backwards is 04415182112
• The number of decimal digits it has is: 11
• The sum of 21128151440's digits is 29
• More coming soon!