21138174720

Names of 21138174720

• Cardinal: 21138174720 can be written as Twenty-one billion, one hundred thirty-eight million, one hundred seventy-four thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.113817472 × 10¹⁰

Factors of 21138174720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 15706

Divisors of 21138174720

• Number of divisors d(n): 360
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 27 30 32 36 39 40 45 48 52 54 60 64 65 72 78 80 81 90 96 104 108 117 120 128 130 135 144 156 160 162 180 192 195 208 216 234 240 256 260 270 288 312 320 324 351 360 384 390 405 416 432 468 480 520 540 576 585 624 640 648 702 720 768 780 810 832 864 936 960 1040 1053 1080 1152 1170 1248 1280 1296 1404 1440 1560 1620 1664 1728 1755 1872 1920 2080 2106 2160 2304 2340 2496 2592 2808 2880 3120 3240 3328 3456 3510 3744 3840 4160 4212 4320 4680 4992 5184 5265 5616 5760 6240 6480 6912 7020 7488 8320 8424 8640 9360 9984 10368 10530 11232 11520 12480 12960 14040 14976 15683 16640 16848 17280 18720 20736 21060 22464 24960 25920 28080 29952 31366 33696 34560 37440 42120 44928 47049 49920 51840 56160 62732 67392 74880 78415 84240 89856 94098 103680 112320 125464 134784 141147 149760 156830 168480 188196 203879 224640 235245 250928 269568 282294 313660 336960 376392 407758 423441 449280 470490 501856 564588 611637 627320 673920 705735 752784 815516 846882 940980 1003712 1019395 1129176 1223274 1254640 1270323 1347840 1411470 1505568 1631032 1693764 1834911 1881960 2007424 2038790 2117205 2258352 2446548 2509280 2540646 2822940 3011136 3058185 3262064 3387528 3669822 3763920 4014848 4077580 4234410 4516704 4893096 5018560 5081292 5504733 5645880 6022272 6116370 6351615 6524128 6775056 7339644 7527840 8155160 8468820 9033408 9174555 9786192 10037120 10162584 11009466 11291760 12044544 12232740 12703230 13048256 13550112 14679288 15055680 16310320 16514199 16937640 18066816 18349110 19572384 20074240 20325168 22018932 22583520 24465480 25406460 26096512 27100224 27523665 29358576 30111360 32620640 33028398 33875280 36133632 36698220 39144768 40650336 44037864 45167040 48930960 50812920 52193024 54200448 55047330 58717152 60222720 65241280 66056796 67750560 73396440 78289536 81300672 82570995 88075728 90334080 97861920 101625840 108400896 110094660 117434304 130482560 132113592 135501120 146792880 156579072 162601344 165141990 176151456 180668160 195723840 203251680 220189320 234868608 260965120 264227184 271002240 293585760 325202688 330283980 352302912 391447680 406503360 440378640 469737216 528454368 542004480 587171520 660567960 704605824 782895360 813006720 880757280 1056908736 1174343040 1321135920 1409211648 1626013440 1761514560 2113817472 2348686080 2642271840 3523029120 4227634944 5284543680 7046058240 10569087360 21138174720
• Sum of all divisors σ(n): 81459621936
• Sum of proper divisors (its aliquot sum) s(n): 60321447216
• 21138174720 is an abundant number, because the sum of its proper divisors (60321447216) is greater than itself. Its abundance is 39183272496

Bases of 21138174720

• Binary: 10011101011111011101111001100000000₂
• Hexadecimal: 0x4EBEEF300
• Base-36: 9PL4G00

Squares and roots of 21138174720

• 21138174720 squared (21138174720²) is 446822430493247078400
• 21138174720 cubed (21138174720³) is 9445010604581312523348738048000
• The square root of 21138174720 is 145389.7338879193
• The cube root of 21138174720 is 2764.9619624449

Scales and comparisons

• 21,138,174,720 seconds is equal to 672 years, 6 weeks, 4 days, 19 hours, 12 minutes.
• To count from 1 to 21,138,174,720 would take you about one thousand, three hundred forty-four 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 21138174720 cubic inches would be around 230.4 feet tall.

Recreational maths with 21138174720

• 21138174720 backwards is 02747183112
• 21138174720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21138174720's digits is 36
• More coming soon!