21238745216

Names of 21238745216

• Cardinal: 21238745216 can be written as Twenty-one billion, two hundred thirty-eight million, seven hundred forty-five thousand, two hundred sixteen.

Scientific notation

• Scientific notation: 2.1238745216 × 10¹⁰

Factors of 21238745216

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 1862

Divisors of 21238745216

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 8 13 16 26 32 41 52 64 82 104 128 164 193 208 328 386 416 533 656 772 832 1066 1312 1544 1613 1664 2132 2509 2624 3088 3226 4264 5018 5248 6176 6452 7913 8528 10036 12352 12904 15826 17056 20072 20969 24704 25808 31652 34112 40144 41938 51616 63304 66133 68224 80288 83876 102869 103232 126608 132266 160576 167752 205738 206464 253216 264532 311309 321152 335504 411476 506432 529064 622618 671008 822952 859729 1012864 1058128 1245236 1342016 1645904 1719458 2116256 2490472 2684032 3291808 3438916 4047017 4232512 4980944 6583616 6877832 8094034 8465024 9961888 12763669 13167232 13755664 16188068 19923776 25527338 27511328 32376136 39847552 51054676 55022656 64752272 102109352 110045312 129504544 165927697 204218704 259009088 331855394 408437408 518018176 663710788 816874816 1327421576 1633749632 2654843152 5309686304 10619372608 21238745216
• Sum of all divisors σ(n): 46948613040
• Sum of proper divisors (its aliquot sum) s(n): 25709867824
• 21238745216 is an abundant number, because the sum of its proper divisors (25709867824) is greater than itself. Its abundance is 4471122608

Bases of 21238745216

• Binary: 10011110001111011011000100010000000₂
• Hexadecimal: 0x4F1ED8880
• Base-36: 9R900OW

Squares and roots of 21238745216

• 21238745216 squared (21238745216²) is 451084298350162886656
• 21238745216 cubed (21238745216³) is 9580464483597238701785870237696
• The square root of 21238745216 is 145735.1886676653
• The cube root of 21238745216 is 2769.3400407885

Scales and comparisons

• 21,238,745,216 seconds is equal to 675 years, 16 weeks, 6 days, 19 hours, 26 minutes, 56 seconds.
• To count from 1 to 21,238,745,216 would take you about one thousand, three hundred fifty years!

  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 21238745216 cubic inches would be around 230.8 feet tall.

Recreational maths with 21238745216

• 21238745216 backwards is 61254783212
• 21238745216 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21238745216's digits is 41
• More coming soon!