21081492

Names of 21081492

• Cardinal: 21081492 can be written as Twenty-one million, eighty-one thousand, four hundred ninety-two.

Scientific notation

• Scientific notation: 2.1081492 × 10⁷

Factors of 21081492

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 214

Divisors of 21081492

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 9 12 18 27 29 36 53 54 58 87 106 108 116 127 159 174 212 254 261 318 348 381 477 508 522 636 762 783 954 1044 1143 1431 1524 1537 1566 1908 2286 2862 3074 3132 3429 3683 4572 4611 5724 6148 6731 6858 7366 9222 11049 13462 13716 13833 14732 18444 20193 22098 26924 27666 33147 40386 41499 44196 55332 60579 66294 80772 82998 99441 121158 132588 165996 181737 195199 198882 242316 363474 390398 397764 585597 726948 780796 1171194 1756791 2342388 3513582 5270373 7027164 10540746 21081492
• Sum of all divisors σ(n): 58060800
• Sum of proper divisors (its aliquot sum) s(n): 36979308
• 21081492 is an abundant number, because the sum of its proper divisors (36979308) is greater than itself. Its abundance is 15897816

Bases of 21081492

• Binary: 1010000011010110110010100₂
• Hexadecimal: 0x141AD94
• Base-36: CJUL0

Squares and roots of 21081492

• 21081492 squared (21081492²) is 444429304946064
• 21081492 cubed (21081492³) is 9369232836786008647488
• The square root of 21081492 is 4591.4585917767
• The cube root of 21081492 is 276.2488304175

Scales and comparisons

• 21,081,492 seconds is equal to 34 weeks, 5 days, 23 hours, 58 minutes, 12 seconds.
• To count from 1 to 21,081,492 would take you about twenty-three 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 21081492 cubic inches would be around 23 feet tall.

Recreational maths with 21081492

• 21081492 backwards is 29418012
• 21081492 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21081492's digits is 27
• More coming soon!