21428988671567985

Names of 21428988671567985

• Cardinal: 21428988671567985 can be written as Twenty-one quadrillion, four hundred twenty-eight trillion, nine hundred eighty-eight billion, six hundred seventy-one million, five hundred sixty-seven thousand, nine hundred eighty-five.

Scientific notation

• Scientific notation: 2.1428988671567985 × 10¹⁶

Factors of 21428988671567985

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 32224286485

Divisors of 21428988671567985

• Number of divisors d(n): 32
• Complete list of divisors:
  1 3 5 15 43 129 215 645 1031 3093 5155 15465 44333 132999 221665 664995 32224285403 96672856209 161121427015 483364281045 1385644272329 4156932816987 6928221361645 20784664084935 33223238250493 99669714751479 166116191252465 498348573757395 1428599244771199 4285797734313597 7142996223855995 21428988671567985
• Sum of all divisors σ(n): 35117768438995968
• Sum of proper divisors (its aliquot sum) s(n): 13688779767427983
• 21428988671567985 is a deficient number, because the sum of its proper divisors (13688779767427983) is less than itself. Its deficiency is 7740208904140002

Bases of 21428988671567985

• Binary: 1001100001000011000110100111001101010100010100001110001₂
• Hexadecimal: 0x4C218D39AA2871
• Base-36: 5UZXXHQYK4X

Squares and roots of 21428988671567985

• 21428988671567985 squared (21428988671567985²) is 459201555486189034501918476960225
• 21428988671567985 cubed (21428988671567985³) is 9840224930479942312798862249307808208747228396625
• The square root of 21428988671567985 is 146386436.0914903379
• The cube root of 21428988671567985 is 277758.4148966741

Scales and comparisons

• 21,428,988,671,567,985 seconds is equal to 681,375,555 years, 28 weeks, 1 day, 5 hours, 19 minutes, 45 seconds.
• To count from 1 to 21,428,988,671,567,985 would take you about two billion, forty-four million, one hundred twenty-six thousand, six hundred sixty-six 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 21428988671567985 cubic inches would be around 23146.5 feet tall.

Recreational maths with 21428988671567985

• 21428988671567985 backwards is 58976517688982412
• The number of decimal digits it has is: 17
• The sum of 21428988671567985's digits is 96
• More coming soon!