20400812640

Names of 20400812640

• Cardinal: 20400812640 can be written as Twenty billion, four hundred million, eight hundred twelve thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.040081264 × 10¹⁰

Factors of 20400812640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 8731

Divisors of 20400812640

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 30 32 36 39 40 45 48 52 60 65 72 78 80 90 96 104 117 120 127 130 144 156 160 180 195 208 234 240 254 260 288 312 360 381 390 416 468 480 508 520 585 624 635 720 762 780 936 1016 1040 1143 1170 1248 1270 1440 1524 1560 1651 1872 1905 2032 2080 2286 2340 2540 3048 3120 3302 3744 3810 4064 4572 4680 4953 5080 5715 6096 6240 6604 7620 8255 8581 9144 9360 9906 10160 11430 12192 13208 14859 15240 16510 17162 18288 18720 19812 20320 22860 24765 25743 26416 29718 30480 33020 34324 36576 39624 42905 45720 49530 51486 52832 59436 60960 66040 68648 74295 77229 79248 85810 91440 99060 102972 111553 118872 128715 132080 137296 148590 154458 158496 171620 182880 198120 205944 223106 237744 257430 264160 274592 297180 308916 334659 343240 386145 396240 411888 446212 475488 514860 557765 594360 617832 669318 686480 772290 792480 823776 892424 1003977 1029720 1089787 1115530 1188720 1235664 1338636 1372960 1544580 1673295 1784848 2007954 2059440 2179574 2231060 2377440 2471328 2677272 3089160 3269361 3346590 3569696 4015908 4118880 4359148 4462120 5019885 5354544 5448935 6178320 6538722 6693180 8031816 8718296 8924240 9808083 10039770 10709088 10897870 12356640 13077444 13386360 14167231 16063632 16346805 17436592 17848480 19616166 20079540 21795740 26154888 26772720 28334462 32127264 32693610 34873184 39232332 40159080 42501693 43591480 49040415 52309776 53545440 56668924 65387220 70836155 78464664 80318160 85003386 87182960 98080830 104619552 113337848 127505079 130774440 141672310 156929328 160636320 170006772 174365920 196161660 212508465 226675696 255010158 261548880 283344620 313858656 340013544 392323320 425016930 453351392 510020316 523097760 566689240 637525395 680027088 784646640 850033860 1020040632 1133378480 1275050790 1360054176 1569293280 1700067720 2040081264 2266756960 2550101580 3400135440 4080162528 5100203160 6800270880 10200406320 20400812640
• Sum of all divisors σ(n): 75572130816
• Sum of proper divisors (its aliquot sum) s(n): 55171318176
• 20400812640 is an abundant number, because the sum of its proper divisors (55171318176) is greater than itself. Its abundance is 34770505536

Bases of 20400812640

• Binary: 10010111111111110111011001001100000₂
• Hexadecimal: 0x4BFFBB260
• Base-36: 9DE47S0

Squares and roots of 20400812640

• 20400812640 squared (20400812640²) is 416193156372383769600
• 20400812640 cubed (20400812640³) is 8490678605203223353786527744000
• The square root of 20400812640 is 142831.4133515455
• The cube root of 20400812640 is 2732.4306975245

Scales and comparisons

• 20,400,812,640 seconds is equal to 648 years, 35 weeks, 3 days, 12 hours, 24 minutes.
• To count from 1 to 20,400,812,640 would take you about one thousand, two hundred ninety-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 20400812640 cubic inches would be around 227.7 feet tall.

Recreational maths with 20400812640

• 20400812640 backwards is 04621800402
• The number of decimal digits it has is: 11
• The sum of 20400812640's digits is 27
• More coming soon!