18121506975

Names of 18121506975

• Cardinal: 18121506975 can be written as Eighteen billion, one hundred twenty-one million, five hundred six thousand, nine hundred seventy-five.

Scientific notation

• Scientific notation: 1.8121506975 × 10¹⁰

Factors of 18121506975

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 333

Divisors of 18121506975

• Number of divisors d(n): 384
• Complete list of divisors:
  1 3 5 9 11 13 15 19 25 27 33 39 41 45 55 57 65 75 95 99 117 123 135 143 165 171 195 205 209 225 241 247 275 285 297 325 351 369 429 451 475 495 513 533 585 615 627 675 715 723 741 779 825 855 975 1025 1045 1107 1205 1235 1287 1353 1425 1485 1599 1755 1845 1881 2145 2169 2223 2255 2337 2475 2565 2651 2665 2717 2925 3075 3133 3135 3575 3615 3705 3861 3895 4059 4275 4579 4797 5225 5535 5643 5863 6025 6175 6435 6507 6669 6765 7011 7425 7953 7995 8151 8569 8775 9225 9399 9405 9881 10127 10725 10845 11115 11275 11685 12177 12825 13255 13325 13585 13737 14391 15665 15675 17589 18075 18525 19305 19475 20295 21033 22895 23859 23985 24453 25707 27675 28197 28215 29315 29643 30381 32175 32535 33345 33825 34463 35055 39765 39975 40755 41211 42845 46995 47025 49405 50369 50635 52767 54225 55575 58425 59527 60885 66275 67925 68685 71577 71955 73359 77121 78325 84591 87945 88929 91143 96525 101475 103389 105165 108691 111397 114475 119295 119925 122265 123633 128453 128535 140985 141075 146575 148215 151107 151905 158301 162675 166725 172315 175275 178581 187739 198825 203775 206055 214225 231363 234975 247025 251845 253175 263835 266787 273429 297635 304425 310167 326073 334191 343425 357885 359775 366795 385359 385605 422955 439725 444645 453321 455715 516945 525825 535743 543455 556985 563217 596475 611325 618165 642265 642675 654797 704925 741075 755535 759525 791505 861575 892905 930501 938695 978219 1002573 1030275 1156077 1156815 1259225 1319175 1333935 1359963 1367145 1412983 1488175 1550835 1607229 1630365 1670955 1689651 1789425 1833975 1926795 1928025 1964391 2065129 2114775 2223225 2266605 2278575 2440607 2584725 2678715 2717275 2784925 2816085 2934657 3007719 3090825 3211325 3273985 3468231 3777675 3957525 4238949 4464525 4652505 4693475 4891095 5012865 5068953 5780385 5784075 5893173 6195387 6669675 6799815 6835725 7064915 7321821 7754175 8036145 8151825 8354775 8448255 9633975 9821955 10325645 11333025 12203035 12716847 13393575 14080425 14673285 15038595 16369925 17341155 17679519 18586161 21194745 21965463 23262525 24455475 25064325 25344765 26846677 28901925 29465865 30976935 33999075 35324575 36609105 38150541 40180725 42241275 49109775 51628225 55758483 61015175 63584235 65896389 73366425 75192975 80540031 86705775 88397595 92930805 105973725 109827315 126723825 134233385 147329325 154884675 183045525 190752705 241620093 278792415 317921175 329481945 402700155 441987975 464654025 549136575 671166925 724860279 953763525 1208100465 1393962075 1647409725 2013500775 3624301395 6040502325 18121506975
• Sum of all divisors σ(n): 42347289600
• Sum of proper divisors (its aliquot sum) s(n): 24225782625
• 18121506975 is an abundant number, because the sum of its proper divisors (24225782625) is greater than itself. Its abundance is 6104275650

Bases of 18121506975

• Binary: 10000111000001000000100000010011111₂
• Hexadecimal: 0x43820409F
• Base-36: 8BP2S9R

Squares and roots of 18121506975

• 18121506975 squared (18121506975²) is 328389015044973650625
• 18121506975 cubed (18121506975³) is 5950903826650869948492150609375
• The square root of 18121506975 is 134616.1467841061
• The cube root of 18121506975 is 2626.6251813705

Scales and comparisons

• 18,121,506,975 seconds is equal to 576 years, 10 weeks, 5 days, 15 hours, 56 minutes, 15 seconds.
• To count from 1 to 18,121,506,975 would take you about one thousand, one hundred fifty-two 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 18121506975 cubic inches would be around 218.9 feet tall.

Recreational maths with 18121506975

• 18121506975 backwards is 57960512181
• 18121506975 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18121506975's digits is 45
• More coming soon!