21393182720

Names of 21393182720

• Cardinal: 21393182720 can be written as Twenty-one billion, three hundred ninety-three million, one hundred eighty-two thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.139318272 × 10¹⁰

Factors of 21393182720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 910

Divisors of 21393182720

• Number of divisors d(n): 312
• Complete list of divisors:
  1 2 4 5 7 8 10 13 14 16 20 26 28 32 35 40 52 56 64 65 70 80 91 104 112 128 130 140 160 169 182 208 224 256 260 280 320 338 364 416 448 455 512 520 560 640 676 728 832 845 883 896 910 1024 1040 1120 1183 1280 1352 1456 1664 1690 1766 1792 1820 2048 2080 2240 2366 2560 2704 2912 3328 3380 3532 3584 3640 4096 4160 4415 4480 4732 5120 5408 5824 5915 6181 6656 6760 7064 7168 7280 8320 8830 8960 9464 10240 10816 11479 11648 11830 12362 13312 13520 14128 14336 14560 16640 17660 17920 18928 20480 21632 22958 23296 23660 24724 26624 27040 28256 28672 29120 30905 33280 35320 35840 37856 43264 45916 46592 47320 49448 53248 54080 56512 57395 58240 61810 66560 70640 71680 75712 80353 86528 91832 93184 94640 98896 108160 113024 114790 116480 123620 133120 141280 143360 149227 151424 160706 173056 183664 186368 189280 197792 216320 226048 229580 232960 247240 266240 282560 298454 302848 321412 346112 367328 372736 378560 395584 401765 432640 452096 459160 465920 494480 565120 596908 605696 642824 692224 734656 746135 757120 791168 803530 865280 904192 918320 931840 988960 1044589 1130240 1193816 1211392 1285648 1469312 1492270 1514240 1582336 1607060 1730560 1808384 1836640 1863680 1977920 2089178 2260480 2387632 2422784 2571296 2938624 2984540 3028480 3164672 3214120 3461120 3616768 3673280 3955840 4178356 4520960 4775264 4845568 5142592 5222945 5877248 5969080 6056960 6329344 6428240 7346560 7911680 8356712 9041920 9550528 10285184 10445890 11754496 11938160 12113920 12658688 12856480 14693120 15823360 16713424 18083840 19101056 20570368 20891780 23508992 23876320 24227840 25317376 25712960 29386240 31646720 33426848 38202112 41140736 41783560 47017984 47752640 51425920 58772480 63293440 66853696 76404224 82281472 83567120 95505280 102851840 117544960 126586880 133707392 152808448 164562944 167134240 191010560 205703680 235089920 267414784 305616896 329125888 334268480 382021120 411407360 534829568 611233792 668536960 764042240 822814720 1069659136 1337073920 1528084480 1645629440 2139318272 2674147840 3056168960 4278636544 5348295680 10696591360 21393182720
• Sum of all divisors σ(n): 63603573696
• Sum of proper divisors (its aliquot sum) s(n): 42210390976
• 21393182720 is an abundant number, because the sum of its proper divisors (42210390976) is greater than itself. Its abundance is 20817208256

Bases of 21393182720

• Binary: 10011111011001000100001000000000000₂
• Hexadecimal: 0x4FB221000
• Base-36: 9TSY5FK

Squares and roots of 21393182720

• 21393182720 squared (21393182720²) is 457668266891306598400
• 21393182720 cubed (21393182720³) is 9790980858751448439112859648000
• The square root of 21393182720 is 146264.0855439227
• The cube root of 21393182720 is 2776.0362537379

Scales and comparisons

• 21,393,182,720 seconds is equal to 680 years, 12 weeks, 2 days, 6 hours, 45 minutes, 20 seconds.
• To count from 1 to 21,393,182,720 would take you about one thousand, three hundred sixty 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 21393182720 cubic inches would be around 231.3 feet tall.

Recreational maths with 21393182720

• 21393182720 backwards is 02728139312
• The number of decimal digits it has is: 11
• The sum of 21393182720's digits is 38
• More coming soon!