20808900

Names of 20808900

• Cardinal: 20808900 can be written as Twenty million, eight hundred eight thousand, nine hundred.

Scientific notation

• Scientific notation: 2.08089 × 10⁷

Factors of 20808900

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 384

Divisors of 20808900

• Number of divisors d(n): 180
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 25 27 28 30 35 36 42 45 50 54 60 63 70 75 81 84 90 100 105 108 126 135 140 150 162 175 180 189 210 225 252 270 300 315 324 350 367 378 405 420 450 525 540 567 630 675 700 734 756 810 900 945 1050 1101 1134 1260 1350 1468 1575 1620 1835 1890 2025 2100 2202 2268 2569 2700 2835 3150 3303 3670 3780 4050 4404 4725 5138 5505 5670 6300 6606 7340 7707 8100 9175 9450 9909 10276 11010 11340 12845 13212 14175 15414 16515 18350 18900 19818 22020 23121 25690 27525 28350 29727 30828 33030 36700 38535 39636 46242 49545 51380 55050 56700 59454 64225 66060 69363 77070 82575 92484 99090 110100 115605 118908 128450 138726 148635 154140 165150 192675 198180 208089 231210 247725 256900 277452 297270 330300 346815 385350 416178 462420 495450 578025 594540 693630 743175 770700 832356 990900 1040445 1156050 1387260 1486350 1734075 2080890 2312100 2972700 3468150 4161780 5202225 6936300 10404450 20808900
• Sum of all divisors σ(n): 77300608
• Sum of proper divisors (its aliquot sum) s(n): 56491708
• 20808900 is an abundant number, because the sum of its proper divisors (56491708) is greater than itself. Its abundance is 35682808

Bases of 20808900

• Binary: 1001111011000010011000100₂
• Hexadecimal: 0x13D84C4
• Base-36: CE090

Squares and roots of 20808900

• 20808900 squared (20808900²) is 433010319210000
• 20808900 cubed (20808900³) is 9010468431408969000000
• The square root of 20808900 is 4561.6773230907
• The cube root of 20808900 is 275.0529925425

Scales and comparisons

• 20,808,900 seconds is equal to 34 weeks, 2 days, 20 hours, 15 minutes.
• To count from 1 to 20,808,900 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 20808900 cubic inches would be around 22.9 feet tall.

Recreational maths with 20808900

• 20808900 backwards is 00980802
• 20808900 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20808900's digits is 27
• More coming soon!