21128231208

Names of 21128231208

• Cardinal: 21128231208 can be written as Twenty-one billion, one hundred twenty-eight million, two hundred thirty-one thousand, two hundred eight.

Scientific notation

• Scientific notation: 2.1128231208 × 10¹⁰

Factors of 21128231208

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 177996

Divisors of 21128231208

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 21 24 28 42 49 56 84 98 101 147 168 196 202 294 303 392 404 588 606 707 808 1176 1212 1414 2121 2424 2828 4242 4949 5656 8484 9898 14847 16968 19796 29694 39592 59388 118776 177883 355766 533649 711532 1067298 1245181 1423064 2134596 2490362 3735543 4269192 4980724 7471086 8716267 9961448 14942172 17432534 17966183 26148801 29884344 34865068 35932366 52297602 53898549 69730136 71864732 104595204 107797098 125763281 143729464 209190408 215594196 251526562 377289843 431188392 503053124 754579686 880342967 1006106248 1509159372 1760685934 2641028901 3018318744 3521371868 5282057802 7042743736 10564115604 21128231208
• Sum of all divisors σ(n): 62053054560
• Sum of proper divisors (its aliquot sum) s(n): 40924823352
• 21128231208 is an abundant number, because the sum of its proper divisors (40924823352) is greater than itself. Its abundance is 19796592144

Bases of 21128231208

• Binary: 10011101011010101110011100100101000₂
• Hexadecimal: 0x4EB573928
• Base-36: 9PF7BJC

Squares and roots of 21128231208

• 21128231208 squared (21128231208²) is 446402153978705139264
• 21128231208 cubed (21128231208³) is 9431687921011299290827630950912
• The square root of 21128231208 is 145355.5338059063
• The cube root of 21128231208 is 2764.5283434125

Scales and comparisons

• 21,128,231,208 seconds is equal to 671 years, 42 weeks, 1 day, 17 hours, 6 minutes, 48 seconds.
• To count from 1 to 21,128,231,208 would take you about one thousand, three hundred forty-three 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 21128231208 cubic inches would be around 230.4 feet tall.

Recreational maths with 21128231208

• 21128231208 backwards is 80213282112
• The number of decimal digits it has is: 11
• The sum of 21128231208's digits is 30
• More coming soon!