21306672

Names of 21306672

• Cardinal: 21306672 can be written as Twenty-one million, three hundred six thousand, six hundred seventy-two.

Scientific notation

• Scientific notation: 2.1306672 × 10⁷

Factors of 21306672

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 116

Divisors of 21306672

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 31 36 37 43 48 54 62 72 74 86 93 108 111 124 129 144 148 172 186 216 222 248 258 279 296 333 344 372 387 432 444 496 516 558 592 666 688 744 774 837 888 999 1032 1116 1147 1161 1332 1333 1488 1548 1591 1674 1776 1998 2064 2232 2294 2322 2664 2666 3096 3182 3348 3441 3996 3999 4464 4588 4644 4773 5328 5332 6192 6364 6696 6882 7992 7998 9176 9288 9546 10323 10664 11997 12728 13392 13764 14319 15984 15996 18352 18576 19092 20646 21328 23994 25456 27528 28638 30969 31992 35991 38184 41292 42957 47988 49321 55056 57276 61938 63984 71982 76368 82584 85914 95976 98642 114552 123876 143964 147963 165168 171828 191952 197284 229104 247752 287928 295926 343656 394568 443889 495504 575856 591852 687312 789136 887778 1183704 1331667 1775556 2367408 2663334 3551112 5326668 7102224 10653336 21306672
• Sum of all divisors σ(n): 66344960
• Sum of proper divisors (its aliquot sum) s(n): 45038288
• 21306672 is an abundant number, because the sum of its proper divisors (45038288) is greater than itself. Its abundance is 23731616

Bases of 21306672

• Binary: 1010001010001110100110000₂
• Hexadecimal: 0x1451D30
• Base-36: COOC0

Squares and roots of 21306672

• 21306672 squared (21306672²) is 453974271715584
• 21306672 cubed (21306672³) is 9672680903882825576448
• The square root of 21306672 is 4615.9150772085
• The cube root of 21306672 is 277.2289244759

Scales and comparisons

• 21,306,672 seconds is equal to 35 weeks, 1 day, 14 hours, 31 minutes, 12 seconds.
• To count from 1 to 21,306,672 would take you about five 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 21306672 cubic inches would be around 23.1 feet tall.

Recreational maths with 21306672

• 21306672 backwards is 27660312
• 21306672 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21306672's digits is 27
• More coming soon!