21271718188728

Names of 21271718188728

• Cardinal: 21271718188728 can be written as Twenty-one trillion, two hundred seventy-one billion, seven hundred eighteen million, one hundred eighty-eight thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1271718188728 × 10¹³

Factors of 21271718188728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 42205790069

Divisors of 21271718188728

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 18 21 24 28 36 42 56 63 72 84 126 168 252 504 42205790057 84411580114 126617370171 168823160228 253234740342 295440530399 337646320456 379852110513 506469480684 590881060798 759704221026 886321591197 1012938961368 1181762121596 1519408442052 1772643182394 2363524243192 2658964773591 3038816884104 3545286364788 5317929547182 7090572729576 10635859094364 21271718188728
• Sum of all divisors σ(n): 65841032490480
• Sum of proper divisors (its aliquot sum) s(n): 44569314301752
• 21271718188728 is an abundant number, because the sum of its proper divisors (44569314301752) is greater than itself. Its abundance is 23297596113024

Bases of 21271718188728

• Binary: 100110101100010110101001101001101011010111000₂
• Hexadecimal: 0x1358B534D6B8
• Base-36: 7JG3BSFY0

Squares and roots of 21271718188728

• 21271718188728 squared (21271718188728²) is 452485994700661625026257984
• 21271718188728 cubed (21271718188728³) is 9625154563618745308846769598852128804352
• The square root of 21271718188728 is 4612127.2953733617
• The cube root of 21271718188728 is 27707.7242547057

Scales and comparisons

• 21,271,718,188,728 seconds is equal to 676,374 years, 43 weeks, 4 days, 23 hours, 58 minutes, 48 seconds.
• To count from 1 to 21,271,718,188,728 would take you about one million, six hundred ninety thousand, nine hundred thirty-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 21271718188728 cubic inches would be around 2309 feet tall.

Recreational maths with 21271718188728

• 21271718188728 backwards is 82788181717212
• 21271718188728 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21271718188728's digits is 63
• More coming soon!