21481020

Names of 21481020

• Cardinal: 21481020 can be written as Twenty-one million, four hundred eighty-one thousand and twenty.

Scientific notation

• Scientific notation: 2.148102 × 10⁷

Factors of 21481020

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 611

Divisors of 21481020

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 9 10 11 12 15 18 19 20 22 30 33 36 38 44 45 55 57 60 66 76 90 95 99 110 114 132 165 171 180 190 198 209 220 228 285 330 342 380 396 418 495 570 571 627 660 684 836 855 990 1045 1140 1142 1254 1710 1713 1881 1980 2090 2284 2508 2855 3135 3420 3426 3762 4180 5139 5710 6270 6281 6852 7524 8565 9405 10278 10849 11420 12540 12562 17130 18810 18843 20556 21698 25124 25695 31405 32547 34260 37620 37686 43396 51390 54245 56529 62810 65094 75372 94215 97641 102780 108490 113058 119339 125620 130188 162735 188430 195282 216980 226116 238678 282645 325470 358017 376860 390564 477356 488205 565290 596695 650940 716034 976410 1074051 1130580 1193390 1432068 1790085 1952820 2148102 2386780 3580170 4296204 5370255 7160340 10740510 21481020
• Sum of all divisors σ(n): 74954880
• Sum of proper divisors (its aliquot sum) s(n): 53473860
• 21481020 is an abundant number, because the sum of its proper divisors (53473860) is greater than itself. Its abundance is 31992840

Bases of 21481020

• Binary: 1010001111100011000111100₂
• Hexadecimal: 0x147C63C
• Base-36: CSEV0

Squares and roots of 21481020

• 21481020 squared (21481020²) is 461434220240400
• 21481020 cubed (21481020³) is 9912077713668437208000
• The square root of 21481020 is 4634.7621298185
• The cube root of 21481020 is 277.9830398707

Scales and comparisons

• 21,481,020 seconds is equal to 35 weeks, 3 days, 14 hours, 57 minutes.
• To count from 1 to 21,481,020 would take you about twenty-two hours!

  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 21481020 cubic inches would be around 23.2 feet tall.

Recreational maths with 21481020

• 21481020 backwards is 02018412
• 21481020 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21481020's digits is 18
• More coming soon!