21428243982

Names of 21428243982

• Cardinal: 21428243982 can be written as Twenty-one billion, four hundred twenty-eight million, two hundred forty-three thousand, nine hundred eighty-two.

Scientific notation

• Scientific notation: 2.1428243982 × 10¹⁰

Factors of 21428243982

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1840

Divisors of 21428243982

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 6 9 18 27 54 81 149 162 199 243 298 398 447 486 597 894 1194 1341 1487 1791 2682 2974 3582 4023 4461 5373 8046 8922 10746 12069 13383 16119 24138 26766 29651 32238 36207 40149 48357 59302 72414 80298 88953 96714 120447 177906 221563 240894 266859 295913 361341 443126 533718 591826 664689 722682 800577 887739 1329378 1601154 1775478 1994067 2401731 2663217 3988134 4803462 5326434 5982201 7205193 7989651 11964402 14410386 15979302 17946603 23968953 35893206 44091037 47937906 53839809 71906859 88182074 107679618 132273111 143813718 264546222 396819333 793638666 1190457999 2380915998 3571373997 7142747994 10714121991 21428243982
• Sum of all divisors σ(n): 48746880000
• Sum of proper divisors (its aliquot sum) s(n): 27318636018
• 21428243982 is an abundant number, because the sum of its proper divisors (27318636018) is greater than itself. Its abundance is 5890392036

Bases of 21428243982

• Binary: 10011111101001110010000111000001110₂
• Hexadecimal: 0x4FD390E0E
• Base-36: 9UDTMVI

Squares and roots of 21428243982

• 21428243982 squared (21428243982²) is 459169640152119216324
• 21428243982 cubed (21428243982³) is 9839199078306754161741309162168
• The square root of 21428243982 is 146383.8924950419
• The cube root of 21428243982 is 2777.5519735193

Scales and comparisons

• 21,428,243,982 seconds is equal to 681 years, 18 weeks, 2 days, 1 hour, 59 minutes, 42 seconds.
• To count from 1 to 21,428,243,982 would take you about one thousand, three hundred sixty-two 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 21428243982 cubic inches would be around 231.5 feet tall.

Recreational maths with 21428243982

• 21428243982 backwards is 28934282412
• The number of decimal digits it has is: 11
• The sum of 21428243982's digits is 45
• More coming soon!