21084870

Names of 21084870

• Cardinal: 21084870 can be written as Twenty-one million, eighty-four thousand, eight hundred seventy.

Scientific notation

• Scientific notation: 2.108487 × 10⁷

Factors of 21084870

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 621

Divisors of 21084870

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 10 15 19 30 38 57 71 95 114 142 190 213 285 355 426 521 570 710 1042 1065 1349 1563 2130 2605 2698 3126 4047 5210 6745 7815 8094 9899 13490 15630 19798 20235 29697 36991 40470 49495 59394 73982 98990 110973 148485 184955 221946 296970 369910 554865 702829 1109730 1405658 2108487 3514145 4216974 7028290 10542435 21084870
• Sum of all divisors σ(n): 54120960
• Sum of proper divisors (its aliquot sum) s(n): 33036090
• 21084870 is an abundant number, because the sum of its proper divisors (33036090) is greater than itself. Its abundance is 11951220

Bases of 21084870

• Binary: 1010000011011101011000110₂
• Hexadecimal: 0x141BAC6
• Base-36: CJX6U

Squares and roots of 21084870

• 21084870 squared (21084870²) is 444571742916900
• 21084870 cubed (21084870³) is 9373737405076257303000
• The square root of 21084870 is 4591.8264340021
• The cube root of 21084870 is 276.2635845713

Scales and comparisons

• 21,084,870 seconds is equal to 34 weeks, 6 days, 54 minutes, 30 seconds.
• To count from 1 to 21,084,870 would take you about two days!

  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 21084870 cubic inches would be around 23 feet tall.

Recreational maths with 21084870

• 21084870 backwards is 07848012
• 21084870 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21084870's digits is 30
• More coming soon!