21393400

Names of 21393400

• Cardinal: 21393400 can be written as Twenty-one million, three hundred ninety-three thousand, four hundred.

Scientific notation

• Scientific notation: 2.13934 × 10⁷

Factors of 21393400

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 110

Divisors of 21393400

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 5 7 8 10 14 20 25 28 35 37 40 49 50 56 59 70 74 98 100 118 140 148 175 185 196 200 236 245 259 280 295 296 350 370 392 413 472 490 518 590 700 740 826 925 980 1036 1180 1225 1295 1400 1475 1480 1652 1813 1850 1960 2065 2072 2183 2360 2450 2590 2891 2950 3304 3626 3700 4130 4366 4900 5180 5782 5900 6475 7252 7400 8260 8732 9065 9800 10325 10360 10915 11564 11800 12950 14455 14504 15281 16520 17464 18130 20650 21830 23128 25900 28910 30562 36260 41300 43660 45325 51800 54575 57820 61124 72275 72520 76405 82600 87320 90650 106967 109150 115640 122248 144550 152810 181300 213934 218300 289100 305620 362600 382025 427868 436600 534835 578200 611240 764050 855736 1069670 1528100 2139340 2674175 3056200 4278680 5348350 10696700 21393400
• Sum of all divisors σ(n): 60431400
• Sum of proper divisors (its aliquot sum) s(n): 39038000
• 21393400 is an abundant number, because the sum of its proper divisors (39038000) is greater than itself. Its abundance is 17644600

Bases of 21393400

• Binary: 1010001100110111111111000₂
• Hexadecimal: 0x1466FF8
• Base-36: CQJ94

Squares and roots of 21393400

• 21393400 squared (21393400²) is 457677563560000
• 21393400 cubed (21393400³) is 9791279188264504000000
• The square root of 21393400 is 4625.2999902709
• The cube root of 21393400 is 277.6045651983

Scales and comparisons

• 21,393,400 seconds is equal to 35 weeks, 2 days, 14 hours, 36 minutes, 40 seconds.
• To count from 1 to 21,393,400 would take you about nine 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 21393400 cubic inches would be around 23.1 feet tall.

Recreational maths with 21393400

• 21393400 backwards is 00439312
• The number of decimal digits it has is: 8
• The sum of 21393400's digits is 22
• More coming soon!