21000640000

Names of 21000640000

• Cardinal: 21000640000 can be written as Twenty-one billion, six hundred forty thousand.

Scientific notation

• Scientific notation: 2.100064 × 10¹⁰

Factors of 21000640000

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 140

Divisors of 21000640000

• Number of divisors d(n): 400
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 29 31 32 40 50 58 62 64 73 80 100 116 124 125 128 145 146 155 160 200 232 248 250 256 290 292 310 320 365 400 464 496 500 512 580 584 620 625 640 725 730 775 800 899 928 992 1000 1160 1168 1240 1250 1280 1450 1460 1550 1600 1798 1825 1856 1984 2000 2117 2263 2320 2336 2480 2500 2560 2900 2920 3100 3200 3596 3625 3650 3712 3875 3968 4000 4234 4495 4526 4640 4672 4960 5000 5800 5840 6200 6400 7192 7250 7300 7424 7750 7936 8000 8468 8990 9052 9125 9280 9344 9920 10000 10585 11315 11600 11680 12400 12800 14384 14500 14600 14848 15500 15872 16000 16936 17980 18104 18125 18250 18560 18688 19375 19840 20000 21170 22475 22630 23200 23360 24800 28768 29000 29200 31000 32000 33872 35960 36208 36250 36500 37120 37376 38750 39680 40000 42340 44950 45260 45625 46400 46720 49600 52925 56575 57536 58000 58400 62000 64000 65627 67744 71920 72416 72500 73000 74240 77500 79360 80000 84680 89900 90520 91250 92800 93440 99200 105850 112375 113150 115072 116000 116800 124000 131254 135488 143840 144832 145000 146000 155000 160000 169360 179800 181040 182500 185600 186880 198400 211700 224750 226300 230144 232000 233600 248000 262508 264625 270976 282875 287680 289664 290000 292000 310000 320000 328135 338720 359600 362080 365000 371200 396800 423400 449500 452600 460288 464000 467200 496000 525016 529250 541952 561875 565750 575360 579328 580000 584000 620000 656270 677440 719200 724160 730000 846800 899000 905200 928000 934400 992000 1050032 1058500 1083904 1123750 1131500 1150720 1158656 1160000 1168000 1240000 1312540 1323125 1354880 1414375 1438400 1448320 1460000 1640675 1693600 1798000 1810400 1856000 1984000 2100064 2117000 2247500 2263000 2301440 2320000 2336000 2480000 2625080 2646250 2709760 2828750 2876800 2896640 2920000 3281350 3387200 3596000 3620800 4200128 4234000 4495000 4526000 4640000 4672000 4960000 5250160 5292500 5419520 5657500 5753600 5793280 5840000 6562700 6774400 7192000 7241600 8203375 8400256 8468000 8990000 9052000 9280000 9920000 10500320 10585000 11315000 11507200 11680000 13125400 13548800 14384000 14483200 16406750 16800512 16936000 17980000 18104000 21000640 21170000 22630000 23360000 26250800 27097600 28768000 28966400 32813500 33601024 33872000 35960000 36208000 41016875 42001280 42340000 45260000 52501600 57536000 65627000 67744000 71920000 72416000 82033750 84002560 84680000 90520000 105003200 131254000 135488000 143840000 144832000 164067500 168005120 169360000 181040000 210006400 262508000 287680000 328135000 338720000 362080000 420012800 525016000 656270000 677440000 724160000 840025600 1050032000 1312540000 2100064000 2625080000 4200128000 5250160000 10500320000 21000640000
• Sum of all divisors σ(n): 56758331520
• Sum of proper divisors (its aliquot sum) s(n): 35757691520
• 21000640000 is an abundant number, because the sum of its proper divisors (35757691520) is greater than itself. Its abundance is 14757051520

Bases of 21000640000

• Binary: 10011100011101111000101011000000000₂
• Hexadecimal: 0x4E3BC5600
• Base-36: 9NB8LJ4

Squares and roots of 21000640000

• 21000640000 squared (21000640000²) is 441026880409600000000
• 21000640000 cubed (21000640000³) is 9261846745805062144000000000000
• The square root of 21000640000 is 144915.9756548601
• The cube root of 21000640000 is 2758.9522032627

Scales and comparisons

• 21,000,640,000 seconds is equal to 667 years, 39 weeks, 1 day, 23 hours, 6 minutes, 40 seconds.
• To count from 1 to 21,000,640,000 would take you about one thousand, three hundred thirty-five 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 21000640000 cubic inches would be around 229.9 feet tall.

Recreational maths with 21000640000

• 21000640000 backwards is 00004600012
• The number of decimal digits it has is: 11
• The sum of 21000640000's digits is 13
• More coming soon!