20997543728

Names of 20997543728

• Cardinal: 20997543728 can be written as Twenty billion, nine hundred ninety-seven million, five hundred forty-three thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.0997543728 × 10¹⁰

Factors of 20997543728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 19900

Divisors of 20997543728

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 7 8 14 16 28 29 56 58 112 116 203 232 331 406 464 662 812 1324 1624 2317 2648 3248 4634 5296 9268 9599 18536 19198 19531 37072 38396 39062 67193 76792 78124 134386 136717 153584 156248 268772 273434 312496 537544 546868 566399 1075088 1093736 1132798 2187472 2265596 3964793 4531192 6464761 7929586 9062384 12929522 15859172 25859044 31718344 45253327 51718088 63436688 90506654 103436176 181013308 187478069 362026616 374956138 724053232 749912276 1312346483 1499824552 2624692966 2999649104 5249385932 10498771864 20997543728
• Sum of all divisors σ(n): 48245602560
• Sum of proper divisors (its aliquot sum) s(n): 27248058832
• 20997543728 is an abundant number, because the sum of its proper divisors (27248058832) is greater than itself. Its abundance is 6250515104

Bases of 20997543728

• Binary: 10011100011100011010001011100110000₂
• Hexadecimal: 0x4E38D1730
• Base-36: 9N9E8FK

Squares and roots of 20997543728

• 20997543728 squared (20997543728²) is 440896842609272137984
• 20997543728 cubed (20997543728³) is 9257750732225325335571089764352
• The square root of 20997543728 is 144905.2922705033
• The cube root of 20997543728 is 2758.8166060251

Scales and comparisons

• 20,997,543,728 seconds is equal to 667 years, 34 weeks, 1 day, 3 hours, 2 minutes, 8 seconds.
• To count from 1 to 20,997,543,728 would take you about one thousand, three hundred thirty-five 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 20997543728 cubic inches would be around 229.9 feet tall.

Recreational maths with 20997543728

• 20997543728 backwards is 82734579902
• 20997543728 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 20997543728's digits is 56
• More coming soon!