21345520221

Names of 21345520221

• Cardinal: 21345520221 can be written as Twenty-one billion, three hundred forty-five million, five hundred twenty thousand, two hundred twenty-one.

Scientific notation

• Scientific notation: 2.1345520221 × 10¹⁰

Factors of 21345520221

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 107

Divisors of 21345520221

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 9 27 43 61 81 129 183 243 387 549 729 1161 1647 2187 2623 3483 3721 4941 7869 10449 11163 14823 23607 31347 33489 44469 70821 94041 100467 133407 160003 212463 226981 301401 480009 637389 680943 904203 1440027 1912167 2042829 2712609 4320081 5736501 6128487 8137827 9760183 12960243 18385461 29280549 38880729 55156383 87841647 116642187 165469149 263524941 349926561 496407447 790574823 2371724469 7115173407 21345520221
• Sum of all divisors σ(n): 33303860480
• Sum of proper divisors (its aliquot sum) s(n): 11958340259
• 21345520221 is a deficient number, because the sum of its proper divisors (11958340259) is less than itself. Its deficiency is 9387179962

Bases of 21345520221

• Binary: 10011111000010010101100101001011101₂
• Hexadecimal: 0x4F84ACA5D
• Base-36: 9T0KKT9

Squares and roots of 21345520221

• 21345520221 squared (21345520221²) is 455631233505119888841
• 21345520221 cubed (21345520221³) is 9725685708102709294284837753861
• The square root of 21345520221 is 146101.0616696539
• The cube root of 21345520221 is 2773.9731166175

Scales and comparisons

• 21,345,520,221 seconds is equal to 678 years, 37 weeks, 3 days, 15 hours, 10 minutes, 21 seconds.
• To count from 1 to 21,345,520,221 would take you about one thousand, three hundred fifty-seven 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 21345520221 cubic inches would be around 231.2 feet tall.

Recreational maths with 21345520221

• 21345520221 backwards is 12202554312
• 21345520221 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21345520221's digits is 27
• More coming soon!