20861820

Names of 20861820

• Cardinal: 20861820 can be written as Twenty million, eight hundred sixty-one thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 2.086182 × 10⁷

Factors of 20861820

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 5536

Divisors of 20861820

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 27 28 30 35 36 42 45 54 60 63 70 84 90 105 108 126 135 140 180 189 210 252 270 315 378 420 540 630 756 945 1260 1890 3780 5519 11038 16557 22076 27595 33114 38633 49671 55190 66228 77266 82785 99342 110380 115899 149013 154532 165570 193165 198684 231798 248355 298026 331140 347697 386330 463596 496710 579495 596052 695394 745065 772660 993420 1043091 1158990 1390788 1490130 1738485 2086182 2317980 2980260 3476970 4172364 5215455 6953940 10430910 20861820
• Sum of all divisors σ(n): 74188800
• Sum of proper divisors (its aliquot sum) s(n): 53326980
• 20861820 is an abundant number, because the sum of its proper divisors (53326980) is greater than itself. Its abundance is 32465160

Bases of 20861820

• Binary: 1001111100101001101111100₂
• Hexadecimal: 0x13E537C
• Base-36: CF530

Squares and roots of 20861820

• 20861820 squared (20861820²) is 435215533712400
• 20861820 cubed (20861820³) is 9079388125512020568000
• The square root of 20861820 is 4567.4741378581
• The cube root of 20861820 is 275.2859614901

Scales and comparisons

• 20,861,820 seconds is equal to 34 weeks, 3 days, 10 hours, 57 minutes.
• To count from 1 to 20,861,820 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 20861820 cubic inches would be around 22.9 feet tall.

Recreational maths with 20861820

• 20861820 backwards is 02816802
• 20861820 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20861820's digits is 27
• More coming soon!