21100380

Names of 21100380

• Cardinal: 21100380 can be written as Twenty-one million, one hundred thousand, three hundred eighty.

Scientific notation

• Scientific notation: 2.110038 × 10⁷

Factors of 21100380

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 7194

Divisors of 21100380

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 49 60 70 84 98 105 140 147 196 210 245 294 420 490 588 735 980 1470 2940 7177 14354 21531 28708 35885 43062 50239 71770 86124 100478 107655 143540 150717 200956 215310 251195 301434 351673 430620 502390 602868 703346 753585 1004780 1055019 1406692 1507170 1758365 2110038 3014340 3516730 4220076 5275095 7033460 10550190 21100380
• Sum of all divisors σ(n): 68736528
• Sum of proper divisors (its aliquot sum) s(n): 47636148
• 21100380 is an abundant number, because the sum of its proper divisors (47636148) is greater than itself. Its abundance is 26535768

Bases of 21100380

• Binary: 1010000011111011101011100₂
• Hexadecimal: 0x141F75C
• Base-36: CK95O

Squares and roots of 21100380

• 21100380 squared (21100380²) is 445226036144400
• 21100380 cubed (21100380³) is 9394438548540574872000
• The square root of 21100380 is 4593.5149939889
• The cube root of 21100380 is 276.3313076665

Scales and comparisons

• 21,100,380 seconds is equal to 34 weeks, 6 days, 5 hours, 13 minutes.
• To count from 1 to 21,100,380 would take you about two days!

  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 21100380 cubic inches would be around 23 feet tall.

Recreational maths with 21100380

• 21100380 backwards is 08300112
• 21100380 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21100380's digits is 15
• More coming soon!