21405643875

Names of 21405643875

• Cardinal: 21405643875 can be written as Twenty-one billion, four hundred five million, six hundred forty-three thousand, eight hundred seventy-five.

Scientific notation

• Scientific notation: 2.1405643875 × 10¹⁰

Factors of 21405643875

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 67

Divisors of 21405643875

• Number of divisors d(n): 384
• Complete list of divisors:
  1 3 5 7 9 11 15 21 25 27 33 35 41 45 49 55 63 75 77 99 105 123 125 135 147 165 175 189 205 225 231 245 275 287 297 315 343 369 375 385 441 451 495 525 539 615 675 693 735 825 861 875 945 1025 1029 1107 1125 1155 1225 1323 1353 1375 1435 1485 1575 1617 1681 1715 1845 1925 2009 2079 2205 2255 2475 2583 2625 2695 3075 3087 3157 3375 3465 3675 3773 4059 4125 4305 4725 4851 5043 5125 5145 5535 5775 6027 6125 6615 6765 7175 7425 7749 7875 8085 8405 8575 9225 9261 9471 9625 10045 10395 11025 11275 11319 11767 12177 12375 12915 13475 14063 14553 15129 15375 15435 15785 17325 18081 18375 18491 18865 20295 21525 22099 23625 24255 25215 25725 27675 28413 28875 30135 33075 33825 33957 35301 35875 37125 38745 40425 42025 42189 42875 45387 46125 46305 47355 50225 51975 54243 55125 55473 56375 56595 58835 60885 64575 66297 67375 70315 72765 75645 77175 78925 82369 85239 86625 90405 92455 94325 101475 101871 105903 107625 110495 121275 126075 126567 128625 129437 138375 142065 150675 154693 165375 166419 169125 169785 176505 193725 198891 202125 210125 210945 226935 231525 236775 247107 251125 259875 271215 277365 282975 294175 304425 317709 322875 331485 351575 363825 378225 379701 385875 388311 394625 411845 426195 452025 462275 464079 471625 499257 507375 509355 529515 552475 576583 596673 606375 630375 632835 647185 710325 741321 753375 773465 832095 848925 882525 906059 968625 994455 1054725 1134675 1157625 1164933 1183875 1235535 1356075 1386825 1392237 1414875 1470875 1522125 1588545 1657425 1729749 1757875 1819125 1891125 1898505 1941555 2059225 2130975 2223963 2260125 2311375 2320395 2496285 2546775 2647575 2718177 2762375 2882915 2983365 3164175 3235925 3494799 3551625 3706605 3867325 4160475 4176711 4244625 4412625 4530295 4972275 5189247 5273625 5673375 5824665 6177675 6342413 6780375 6934125 6961185 7942725 8154531 8287125 8648745 9492525 9707775 10296125 10654875 11119815 11601975 12481425 12733875 13237875 13590885 14414575 14916825 15567741 15820875 16179625 17473995 18533025 19027239 19336625 20802375 20883555 22651475 24463593 24861375 25946235 29123325 30888375 31712065 34805925 39713625 40772655 43243725 47462625 48538875 55599075 57081717 58009875 62407125 67954425 72072875 74584125 77838705 87369975 92665125 95136195 104417775 113257375 122317965 129731175 145616625 158560325 171245151 174029625 203863275 216218625 277995375 285408585 339772125 389193525 436849875 475680975 522088875 611589825 648655875 792801625 856225755 1019316375 1427042925 1945967625 2378404875 3057949125 4281128775 7135214625 21405643875
• Sum of all divisors σ(n): 51607296000
• Sum of proper divisors (its aliquot sum) s(n): 30201652125
• 21405643875 is an abundant number, because the sum of its proper divisors (30201652125) is greater than itself. Its abundance is 8796008250

Bases of 21405643875

• Binary: 10011111011111000000011010001100011₂
• Hexadecimal: 0x4FBE03463
• Base-36: 9U0D8IR

Squares and roots of 21405643875

• 21405643875 squared (21405643875²) is 458201589703325015625
• 21405643875 cubed (21405643875³) is 9808100052148242187847560546875
• The square root of 21405643875 is 146306.6774791909
• The cube root of 21405643875 is 2776.5751466513

Scales and comparisons

• 21,405,643,875 seconds is equal to 680 years, 32 weeks, 6 days, 12 hours, 11 minutes, 15 seconds.
• To count from 1 to 21,405,643,875 would take you about one thousand, three hundred sixty-one 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 21405643875 cubic inches would be around 231.4 feet tall.

Recreational maths with 21405643875

• 21405643875 backwards is 57834650412
• 21405643875 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21405643875's digits is 45
• More coming soon!