21378675840

Names of 21378675840

• Cardinal: 21378675840 can be written as Twenty-one billion, three hundred seventy-eight million, six hundred seventy-five thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.137867584 × 10¹⁰

Factors of 21378675840

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 899

Divisors of 21378675840

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 64 80 96 97 120 128 160 191 192 194 240 291 320 382 384 388 480 485 573 582 601 640 764 776 955 960 970 1146 1164 1202 1455 1528 1552 1803 1910 1920 1940 2292 2328 2404 2865 2910 3005 3056 3104 3606 3820 3880 4584 4656 4808 5730 5820 6010 6112 6208 7212 7640 7760 9015 9168 9312 9616 11460 11640 12020 12224 12416 14424 15280 15520 18030 18336 18527 18624 19232 22920 23280 24040 24448 28848 30560 31040 36060 36672 37054 37248 38464 45840 46560 48080 55581 57696 58297 61120 62080 72120 73344 74108 76928 91680 92635 93120 96160 111162 114791 115392 116594 122240 144240 148216 174891 183360 185270 186240 192320 222324 229582 230784 233188 277905 288480 291485 296432 344373 349782 366720 370540 384640 444648 459164 466376 555810 573955 576960 582970 592864 688746 699564 741080 874455 889296 918328 932752 1111620 1147910 1153920 1165940 1185728 1377492 1399128 1482160 1721865 1748910 1778592 1836656 1865504 2223240 2295820 2331880 2371456 2754984 2798256 2964320 3443730 3497820 3557184 3673312 3731008 4446480 4591640 4663760 5509968 5596512 5928640 6887460 6995640 7114368 7346624 7462016 8892960 9183280 9327520 11019936 11134727 11193024 11857280 13774920 13991280 14693248 17785920 18366560 18655040 22039872 22269454 22386048 27549840 27982560 33404181 35571840 36733120 37310080 44079744 44538908 55099680 55673635 55965120 66808362 73466240 89077816 110199360 111347270 111930240 133616724 167020905 178155632 220398720 222694540 267233448 334041810 356311264 445389080 534466896 668083620 712622528 890778160 1068933792 1336167240 1425245056 1781556320 2137867584 2672334480 3563112640 4275735168 5344668960 7126225280 10689337920 21378675840
• Sum of all divisors σ(n): 69322659840
• Sum of proper divisors (its aliquot sum) s(n): 47943984000
• 21378675840 is an abundant number, because the sum of its proper divisors (47943984000) is greater than itself. Its abundance is 26565308160

Bases of 21378675840

• Binary: 10011111010010001001011010010000000₂
• Hexadecimal: 0x4FA44B480
• Base-36: 9TKB7UO

Squares and roots of 21378675840

• 21378675840 squared (21378675840²) is 457047780671799705600
• 21378675840 cubed (21378675840³) is 9771076346373823335429832704000
• The square root of 21378675840 is 146214.4857392727
• The cube root of 21378675840 is 2775.4086280811

Scales and comparisons

• 21,378,675,840 seconds is equal to 679 years, 40 weeks, 2 days, 9 hours, 4 minutes.
• To count from 1 to 21,378,675,840 would take you about one thousand, three hundred fifty-nine 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 21378675840 cubic inches would be around 231.3 feet tall.

Recreational maths with 21378675840

• 21378675840 backwards is 04857687312
• The number of decimal digits it has is: 11
• The sum of 21378675840's digits is 51
• More coming soon!