21656610990

Names of 21656610990

• Cardinal: 21656610990 can be written as Twenty-one billion, six hundred fifty-six million, six hundred ten thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 2.165661099 × 10¹⁰

Factors of 21656610990

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 2092

Divisors of 21656610990

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 21 30 35 42 45 63 70 71 90 105 126 142 210 213 281 315 355 426 497 562 630 639 710 843 994 1065 1278 1405 1491 1686 1723 1967 2130 2485 2529 2810 2982 3195 3446 3934 4215 4473 4970 5058 5169 5901 6390 7455 8430 8615 8946 9835 10338 11802 12061 12645 14910 15507 17230 17703 19670 19951 22365 24122 25290 25845 29505 31014 35406 36183 39902 44730 51690 59010 59853 60305 72366 77535 88515 99755 108549 119706 120610 122333 139657 155070 177030 179559 180915 199510 217098 244666 279314 299265 359118 361830 366999 418971 484163 542745 598530 611665 698285 733998 837942 856331 897795 968326 1085490 1100997 1223330 1256913 1396570 1452489 1712662 1795590 1834995 2094855 2201994 2420815 2513826 2568993 2904978 3389141 3669990 4189710 4281655 4357467 4841630 5137986 5504985 6284565 6778282 7262445 7706979 8563310 8714934 10167423 11009970 12569130 12844965 14524890 15413958 16945705 20334846 21787335 25689930 30502269 33891410 34375573 38534895 43574670 50837115 61004538 68751146 77069790 101674230 103126719 152511345 171877865 206253438 240629011 305022690 309380157 343755730 481258022 515633595 618760314 721887033 1031267190 1203145055 1443774066 1546900785 2165661099 2406290110 3093801570 3609435165 4331322198 7218870330 10828305495 21656610990
• Sum of all divisors σ(n): 65527667712
• Sum of proper divisors (its aliquot sum) s(n): 43871056722
• 21656610990 is an abundant number, because the sum of its proper divisors (43871056722) is greater than itself. Its abundance is 22214445732

Bases of 21656610990

• Binary: 10100001010110101011010100010101110₂
• Hexadecimal: 0x50AD5A8AE
• Base-36: 9Y5SBZI

Squares and roots of 21656610990

• 21656610990 squared (21656610990²) is 469008799572188780100
• 21656610990 cubed (21656610990³) is 10157141123221770833468353299000
• The square root of 21656610990 is 147161.8530394341
• The cube root of 21656610990 is 2787.3841864113

Scales and comparisons

• 21,656,610,990 seconds is equal to 688 years, 31 weeks, 6 days, 5 hours, 16 minutes, 30 seconds.
• To count from 1 to 21,656,610,990 would take you about one thousand, three hundred seventy-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 21656610990 cubic inches would be around 232.3 feet tall.

Recreational maths with 21656610990

• 21656610990 backwards is 09901665612
• 21656610990 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21656610990's digits is 45
• More coming soon!