18991487424

Names of 18991487424

• Cardinal: 18991487424 can be written as Eighteen billion, nine hundred ninety-one million, four hundred eighty-seven thousand, four hundred twenty-four.

Scientific notation

• Scientific notation: 1.8991487424 × 10¹⁰

Factors of 18991487424

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 3194

Divisors of 18991487424

• Number of divisors d(n): 280
• Complete list of divisors:
  1 2 3 4 6 7 8 12 13 14 16 21 24 26 28 32 39 42 48 49 52 56 64 78 84 91 96 98 104 112 147 156 168 182 192 196 208 224 273 294 312 336 343 364 392 416 448 546 588 624 637 672 686 728 784 832 1029 1092 1176 1248 1274 1344 1372 1456 1568 1911 2058 2184 2352 2401 2496 2548 2744 2912 3136 3169 3822 4116 4368 4459 4704 4802 5096 5488 5824 6338 7203 7644 8232 8736 8918 9408 9507 9604 10192 10976 12676 13377 14406 15288 16464 17472 17836 19014 19208 20384 21952 22183 25352 26754 28812 30576 31213 32928 35672 38028 38416 40768 41197 44366 50704 53508 57624 61152 62426 65856 66549 71344 76056 76832 82394 88732 93639 101408 107016 115248 122304 123591 124852 133098 142688 152112 153664 155281 164788 177464 187278 202816 214032 230496 247182 249704 266196 285376 288379 304224 310562 329576 354928 374556 428064 460992 465843 494364 499408 532392 576758 608448 621124 659152 709856 749112 856128 865137 931686 988728 998816 1064784 1086967 1153516 1242248 1318304 1419712 1498224 1730274 1863372 1977456 1997632 2018653 2129568 2173934 2307032 2484496 2636608 2996448 3260901 3460548 3726744 3954912 4037306 4259136 4347868 4614064 4968992 5992896 6055959 6521802 6921096 7453488 7608769 7909824 8074612 8695736 9228128 9937984 12111918 13043604 13842192 14130571 14906976 15217538 16149224 17391472 18456256 22826307 24223836 26087208 27684384 28261142 29813952 30435076 32298448 34782944 42391713 45652614 48447672 52174416 55368768 56522284 60870152 64596896 69565888 84783426 91305228 96895344 98913997 104348832 113044568 121740304 129193792 169566852 182610456 193790688 197827994 208697664 226089136 243480608 296741991 339133704 365220912 387581376 395655988 452178272 486961216 593483982 678267408 730441824 791311976 904356544 1186967964 1356534816 1460883648 1582623952 2373935928 2713069632 3165247904 4747871856 6330495808 9495743712 18991487424
• Sum of all divisors σ(n): 63148657040
• Sum of proper divisors (its aliquot sum) s(n): 44157169616
• 18991487424 is an abundant number, because the sum of its proper divisors (44157169616) is greater than itself. Its abundance is 25165682192

Bases of 18991487424

• Binary: 10001101011111110110001100111000000₂
• Hexadecimal: 0x46BFB19C0
• Base-36: 8Q31HHC

Squares and roots of 18991487424

• 18991487424 squared (18991487424²) is 360676594575950155776
• 18991487424 cubed (18991487424³) is 6849785010020303996270744961024
• The square root of 18991487424 is 137809.6057029407
• The cube root of 18991487424 is 2668.0030809147

Scales and comparisons

• 18,991,487,424 seconds is equal to 603 years, 45 weeks, 1 day, 21 hours, 10 minutes, 24 seconds.
• To count from 1 to 18,991,487,424 would take you about one thousand, two hundred seven 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 18991487424 cubic inches would be around 222.3 feet tall.

Recreational maths with 18991487424

• 18991487424 backwards is 42478419981
• The number of decimal digits it has is: 11
• The sum of 18991487424's digits is 57
• More coming soon!