21029904

Names of 21029904

• Cardinal: 21029904 can be written as Twenty-one million, twenty-nine thousand, nine hundred four.

Scientific notation

• Scientific notation: 2.1029904 × 10⁷

Factors of 21029904

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 716

Divisors of 21029904

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 28 31 36 42 48 56 62 63 72 84 93 112 124 126 144 168 186 217 248 252 279 336 372 434 496 504 558 651 673 744 868 1008 1116 1302 1346 1488 1736 1953 2019 2232 2604 2692 3472 3906 4038 4464 4711 5208 5384 6057 7812 8076 9422 10416 10768 12114 14133 15624 16152 18844 20863 24228 28266 31248 32304 37688 41726 42399 48456 56532 62589 75376 83452 84798 96912 113064 125178 146041 166904 169596 187767 226128 250356 292082 333808 339192 375534 438123 500712 584164 678384 751068 876246 1001424 1168328 1314369 1502136 1752492 2336656 2628738 3004272 3504984 5257476 7009968 10514952 21029904
• Sum of all divisors σ(n): 69535232
• Sum of proper divisors (its aliquot sum) s(n): 48505328
• 21029904 is an abundant number, because the sum of its proper divisors (48505328) is greater than itself. Its abundance is 27475424

Bases of 21029904

• Binary: 1010000001110010000010000₂
• Hexadecimal: 0x140E410
• Base-36: CIQS0

Squares and roots of 21029904

• 21029904 squared (21029904²) is 442256862249216
• 21029904 cubed (21029904³) is 9300619356442236555264
• The square root of 21029904 is 4585.8373281223
• The cube root of 21029904 is 276.0233124605

Scales and comparisons

• 21,029,904 seconds is equal to 34 weeks, 5 days, 9 hours, 38 minutes, 24 seconds.
• To count from 1 to 21,029,904 would take you about 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 21029904 cubic inches would be around 23 feet tall.

Recreational maths with 21029904

• 21029904 backwards is 40992012
• The number of decimal digits it has is: 8
• The sum of 21029904's digits is 27
• More coming soon!