21997347840

Names of 21997347840

• Cardinal: 21997347840 can be written as Twenty-one billion, nine hundred ninety-seven million, three hundred forty-seven thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.199734784 × 10¹⁰

Factors of 21997347840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 36744

Divisors of 21997347840

• Number of divisors d(n): 264
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 30 32 36 39 40 45 48 52 60 64 65 72 78 80 90 96 104 117 120 128 130 144 156 160 180 192 195 208 234 240 256 260 288 312 320 360 384 390 416 468 480 512 520 576 585 624 640 720 768 780 832 936 960 1024 1040 1152 1170 1248 1280 1440 1536 1560 1664 1872 1920 2080 2304 2340 2496 2560 2880 3072 3120 3328 3744 3840 4160 4608 4680 4992 5120 5760 6240 6656 7488 7680 8320 9216 9360 9984 11520 12480 13312 14976 15360 16640 18720 19968 23040 24960 29952 33280 36721 37440 39936 46080 49920 59904 66560 73442 74880 99840 110163 119808 146884 149760 183605 199680 220326 293768 299520 330489 367210 440652 477373 550815 587536 599040 660978 734420 881304 954746 1101630 1175072 1321956 1432119 1468840 1652445 1762608 1909492 2203260 2350144 2386865 2643912 2864238 2937680 3304890 3525216 3818984 4296357 4406520 4700288 4773730 5287824 5728476 5875360 6609780 7050432 7160595 7637968 8592714 8813040 9400576 9547460 10575648 11456952 11750720 13219560 14100864 14321190 15275936 17185428 17626080 18801152 19094920 21151296 21481785 22913904 23501440 26439120 28201728 28642380 30551872 34370856 35252160 37602304 38189840 42302592 42963570 45827808 47002880 52878240 56403456 57284760 61103744 68741712 70504320 76379680 84605184 85927140 91655616 94005760 105756480 112806912 114569520 122207488 137483424 141008640 152759360 169210368 171854280 183311232 188011520 211512960 229139040 244414976 274966848 282017280 305518720 338420736 343708560 366622464 423025920 458278080 488829952 549933696 564034560 611037440 687417120 733244928 846051840 916556160 1099867392 1222074880 1374834240 1466489856 1692103680 1833112320 2199734784 2444149760 2749668480 3666224640 4399469568 5499336960 7332449280 10998673920 21997347840
• Sum of all divisors σ(n): 82085567928
• Sum of proper divisors (its aliquot sum) s(n): 60088220088
• 21997347840 is an abundant number, because the sum of its proper divisors (60088220088) is greater than itself. Its abundance is 38090872248

Bases of 21997347840

• Binary: 10100011111001001001110010000000000₂
• Hexadecimal: 0x51F24E400
• Base-36: A3SNI80

Squares and roots of 21997347840

• 21997347840 squared (21997347840²) is 483883311993952665600
• 21997347840 cubed (21997347840³) is 10644149527902220761698402304000
• The square root of 21997347840 is 148315.0290429125
• The cube root of 21997347840 is 2801.9267283025

Scales and comparisons

• 21,997,347,840 seconds is equal to 699 years, 23 weeks, 1 day, 22 hours, 24 minutes.
• To count from 1 to 21,997,347,840 would take you about one thousand, three hundred ninety-eight 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 21997347840 cubic inches would be around 233.5 feet tall.

Recreational maths with 21997347840

• 21997347840 backwards is 04874379912
• The number of decimal digits it has is: 11
• The sum of 21997347840's digits is 54
• More coming soon!