18211308885

Names of 18211308885

• Cardinal: 18211308885 can be written as Eighteen billion, two hundred eleven million, three hundred eight thousand, eight hundred eighty-five.

Scientific notation

• Scientific notation: 1.8211308885 × 10¹⁰

Factors of 18211308885

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 225

Divisors of 18211308885

• Number of divisors d(n): 216
• Complete list of divisors:
  1 3 5 7 9 11 15 21 33 35 45 49 55 63 77 99 105 121 147 165 199 231 245 315 343 363 385 441 495 539 597 605 693 735 847 995 1029 1089 1155 1393 1617 1715 1791 1815 2189 2205 2401 2541 2695 2985 3087 3465 3773 4179 4235 4851 5145 5445 5929 6567 6965 7203 7623 8085 8955 9751 10945 11319 12005 12537 12705 15323 15435 16807 17787 18865 19701 20895 21609 24079 24255 26411 29253 29645 32835 33957 36015 38115 41503 45969 48755 50421 53361 56595 62685 68257 72237 76615 79233 84035 87759 88935 98505 107261 108045 120395 124509 132055 137907 146265 151263 168553 169785 184877 204771 207515 216711 229845 237699 252105 266805 290521 321783 341285 361185 373527 396165 438795 477799 505659 536305 554631 614313 622545 689535 750827 756315 842765 871563 924385 965349 1023855 1083555 1179871 1188495 1433397 1452605 1516977 1608915 1663893 1867635 2033647 2252481 2388995 2528295 2614689 2773155 3071565 3344593 3539613 3754135 4300191 4357815 4826745 5255789 5899355 6100941 6757443 7166985 7584885 8259097 8319465 10033779 10168235 10618839 11262405 13073445 15767367 16722965 17698065 18302823 21500955 24777291 26278945 30101337 30504705 33787215 36790523 41295485 47302101 50168895 53094195 57813679 74331873 78836835 91514115 110371569 123886455 150506685 173441037 183952615 236510505 289068395 331114707 371659365 404695753 520323111 551857845 867205185 1214087259 1655573535 2023478765 2601615555 3642261777 6070436295 18211308885
• Sum of all divisors σ(n): 40682678400
• Sum of proper divisors (its aliquot sum) s(n): 22471369515
• 18211308885 is an abundant number, because the sum of its proper divisors (22471369515) is greater than itself. Its abundance is 4260060630

Bases of 18211308885

• Binary: 10000111101011110101000010101010101₂
• Hexadecimal: 0x43D7A8555
• Base-36: 8D6JJV9

Squares and roots of 18211308885

• 18211308885 squared (18211308885²) is 331651771304879943225
• 18211308885 cubed (18211308885³) is 6039812849490548153911738054125
• The square root of 18211308885 is 134949.2826398125
• The cube root of 18211308885 is 2630.9568188451

Scales and comparisons

• 18,211,308,885 seconds is equal to 579 years, 3 weeks, 2 days, 54 minutes, 45 seconds.
• To count from 1 to 18,211,308,885 would take you about one thousand, one hundred fifty-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 18211308885 cubic inches would be around 219.2 feet tall.

Recreational maths with 18211308885

• 18211308885 backwards is 58880311281
• 18211308885 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18211308885's digits is 45
• More coming soon!