20891040

Names of 20891040

• Cardinal: 20891040 can be written as Twenty million, eight hundred ninety-one thousand and forty.

Scientific notation

• Scientific notation: 2.089104 × 10⁷

Factors of 20891040

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 694

Divisors of 20891040

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 71 80 96 120 142 160 213 240 284 355 426 480 568 613 710 852 1065 1136 1226 1420 1704 1839 2130 2272 2452 2840 3065 3408 3678 4260 4904 5680 6130 6816 7356 8520 9195 9808 11360 12260 14712 17040 18390 19616 24520 29424 34080 36780 43523 49040 58848 73560 87046 98080 130569 147120 174092 217615 261138 294240 348184 435230 522276 652845 696368 870460 1044552 1305690 1392736 1740920 2089104 2611380 3481840 4178208 5222760 6963680 10445520 20891040
• Sum of all divisors σ(n): 66842496
• Sum of proper divisors (its aliquot sum) s(n): 45951456
• 20891040 is an abundant number, because the sum of its proper divisors (45951456) is greater than itself. Its abundance is 25060416

Bases of 20891040

• Binary: 1001111101100010110100000₂
• Hexadecimal: 0x13EC5A0
• Base-36: CFRMO

Squares and roots of 20891040

• 20891040 squared (20891040²) is 436435552281600
• 20891040 cubed (20891040³) is 9117592580136996864000
• The square root of 20891040 is 4570.6717230621
• The cube root of 20891040 is 275.4144274819

Scales and comparisons

• 20,891,040 seconds is equal to 34 weeks, 3 days, 19 hours, 4 minutes.
• To count from 1 to 20,891,040 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 20891040 cubic inches would be around 23 feet tall.

Recreational maths with 20891040

• 20891040 backwards is 04019802
• 20891040 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20891040's digits is 24
• More coming soon!