20899890

Names of 20899890

• Cardinal: 20899890 can be written as Twenty million, eight hundred ninety-nine thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 2.089989 × 10⁷

Factors of 20899890

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 279

Divisors of 20899890

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 9 10 11 15 18 22 27 30 31 33 45 54 55 62 66 90 93 99 110 135 155 165 186 198 227 270 279 297 310 330 341 454 465 495 558 594 681 682 837 930 990 1023 1135 1362 1395 1485 1674 1705 2043 2046 2270 2497 2790 2970 3069 3405 3410 4086 4185 4994 5115 6129 6138 6810 7037 7491 8370 9207 10215 10230 12258 12485 14074 14982 15345 18414 20430 21111 22473 24970 30645 30690 35185 37455 42222 44946 46035 61290 63333 67419 70370 74910 77407 92070 105555 112365 126666 134838 154814 189999 211110 224730 232221 316665 337095 379998 387035 464442 633330 674190 696663 774070 949995 1161105 1393326 1899990 2089989 2322210 3483315 4179978 6966630 10449945 20899890
• Sum of all divisors σ(n): 63037440
• Sum of proper divisors (its aliquot sum) s(n): 42137550
• 20899890 is an abundant number, because the sum of its proper divisors (42137550) is greater than itself. Its abundance is 21237660

Bases of 20899890

• Binary: 1001111101110100000110010₂
• Hexadecimal: 0x13EE832
• Base-36: CFYGI

Squares and roots of 20899890

• 20899890 squared (20899890²) is 436805402012100
• 20899890 cubed (20899890³) is 9129184853458668669000
• The square root of 20899890 is 4571.6397495869
• The cube root of 20899890 is 275.4533129495

Scales and comparisons

• 20,899,890 seconds is equal to 34 weeks, 3 days, 21 hours, 31 minutes, 30 seconds.
• To count from 1 to 20,899,890 would take you about fifty-one weeks!

  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 20899890 cubic inches would be around 23 feet tall.

Recreational maths with 20899890

• 20899890 backwards is 09899802
• 20899890 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20899890's digits is 45
• More coming soon!