21157200000

Names of 21157200000

• Cardinal: 21157200000 can be written as Twenty-one billion, one hundred fifty-seven million, two hundred thousand.

Scientific notation

• Scientific notation: 2.11572 × 10¹⁰

Factors of 21157200000

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 663

Divisors of 21157200000

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 27 30 32 36 40 45 48 50 54 60 64 72 75 80 81 90 96 100 108 120 125 128 135 144 150 160 162 180 192 200 216 225 240 250 270 288 300 320 324 360 375 384 400 405 432 450 480 500 540 576 600 625 640 648 653 675 720 750 800 810 864 900 960 1000 1080 1125 1152 1200 1250 1296 1306 1350 1440 1500 1600 1620 1728 1800 1875 1920 1959 2000 2025 2160 2250 2400 2500 2592 2612 2700 2880 3000 3125 3200 3240 3265 3375 3456 3600 3750 3918 4000 4050 4320 4500 4800 5000 5184 5224 5400 5625 5760 5877 6000 6250 6480 6530 6750 7200 7500 7836 8000 8100 8640 9000 9375 9600 9795 10000 10125 10368 10448 10800 11250 11754 12000 12500 12960 13060 13500 14400 15000 15672 16000 16200 16325 16875 17280 17631 18000 18750 19590 20000 20250 20896 21600 22500 23508 24000 25000 25920 26120 27000 28125 28800 29385 30000 31344 32400 32650 33750 35262 36000 37500 39180 40000 40500 41792 43200 45000 47016 48000 48975 50000 50625 51840 52240 52893 54000 56250 58770 60000 62688 64800 65300 67500 70524 72000 75000 78360 80000 81000 81625 83584 84375 86400 88155 90000 94032 97950 100000 101250 104480 105786 108000 112500 117540 120000 125376 129600 130600 135000 141048 144000 146925 150000 156720 162000 163250 168750 176310 180000 188064 195900 200000 202500 208960 211572 216000 225000 235080 240000 244875 250752 253125 259200 261200 264465 270000 282096 293850 300000 313440 324000 326500 337500 352620 360000 376128 391800 400000 405000 408125 417920 423144 432000 440775 450000 470160 489750 506250 522400 528930 540000 564192 587700 600000 626880 648000 653000 675000 705240 720000 734625 752256 783600 810000 816250 846288 881550 900000 940320 979500 1012500 1044800 1057860 1080000 1128384 1175400 1200000 1224375 1253760 1296000 1306000 1322325 1350000 1410480 1469250 1567200 1620000 1632500 1692576 1763100 1800000 1880640 1959000 2025000 2040625 2089600 2115720 2160000 2203875 2256768 2350800 2448750 2612000 2644650 2700000 2820960 2938500 3134400 3240000 3265000 3385152 3526200 3600000 3673125 3761280 3918000 4050000 4081250 4231440 4407750 4701600 4897500 5224000 5289300 5400000 5641920 5877000 6121875 6268800 6480000 6530000 6611625 6770304 7052400 7346250 7836000 8100000 8162500 8462880 8815500 9403200 9795000 10448000 10578600 10800000 11019375 11283840 11754000 12243750 13060000 13223250 14104800 14692500 15672000 16200000 16325000 16925760 17631000 18365625 18806400 19590000 21157200 22038750 23508000 24487500 26120000 26446500 28209600 29385000 31344000 32400000 32650000 33058125 33851520 35262000 36731250 39180000 42314400 44077500 47016000 48975000 52240000 52893000 55096875 56419200 58770000 65300000 66116250 70524000 73462500 78360000 84628800 88155000 94032000 97950000 105786000 110193750 117540000 130600000 132232500 141048000 146925000 156720000 165290625 169257600 176310000 195900000 211572000 220387500 235080000 261200000 264465000 282096000 293850000 330581250 352620000 391800000 423144000 440775000 470160000 528930000 587700000 661162500 705240000 783600000 846288000 881550000 1057860000 1175400000 1322325000 1410480000 1763100000 2115720000 2350800000 2644650000 3526200000 4231440000 5289300000 7052400000 10578600000 21157200000
• Sum of all divisors σ(n): 78819838020
• Sum of proper divisors (its aliquot sum) s(n): 57662638020
• 21157200000 is an abundant number, because the sum of its proper divisors (57662638020) is greater than itself. Its abundance is 36505438020

Bases of 21157200000

• Binary: 10011101101000100010100000010000000₂
• Hexadecimal: 0x4ED114080
• Base-36: 9PWG800

Squares and roots of 21157200000

• 21157200000 squared (21157200000²) is 447627111840000000000
• 21157200000 cubed (21157200000³) is 9470536330621248000000000000000
• The square root of 21157200000 is 145455.1477260259
• The cube root of 21157200000 is 2765.7912425205

Scales and comparisons

• 21,157,200,000 seconds is equal to 672 years, 38 weeks, 1 day.
• To count from 1 to 21,157,200,000 would take you about one thousand, three hundred forty-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 21157200000 cubic inches would be around 230.5 feet tall.

Recreational maths with 21157200000

• 21157200000 backwards is 00000275112
• 21157200000 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21157200000's digits is 18
• More coming soon!