21078162909972

Names of 21078162909972

• Cardinal: 21078162909972 can be written as Twenty-one trillion, seventy-eight billion, one hundred sixty-two million, nine hundred nine thousand, nine hundred seventy-two.

Scientific notation

• Scientific notation: 2.1078162909972 × 10¹³

Factors of 21078162909972

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 864773

Divisors of 21078162909972

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 9 12 14 18 21 28 36 42 47 63 84 94 126 141 188 252 282 329 423 564 658 846 987 1316 1692 1974 2063 2961 3948 4126 5922 6189 8252 11844 12378 14441 18567 24756 28882 37134 43323 57764 74268 86646 96961 129969 173292 193922 259938 290883 387844 519876 581766 678727 862651 872649 1163532 1357454 1725302 1745298 2036181 2587953 2714908 3450604 3490596 4072362 5175906 6038557 6108543 7763859 8144724 10351812 12077114 12217086 15527718 18115671 24154228 24434172 31055436 36231342 40544597 54347013 72462684 81089194 108694026 121633791 162178388 217388052 243267582 283812179 364901373 486535164 567624358 729802746 851436537 1135248716 1459605492 1702873074 1779649013 2554309611 3405746148 3559298026 5108619222 5338947039 7118596052 10217238444 10677894078 12457543091 16016841117 21355788156 24915086182 32033682234 37372629273 49830172364 64067364468 74745258546 83643503611 112117887819 149490517092 167287007222 224235775638 250930510833 334574014444 448471551276 501861021666 585504525277 752791532499 1003722043332 1171009050554 1505583064998 1756513575831 2342018101108 3011166129996 3513027151662 5269540727493 7026054303324 10539081454986 21078162909972
• Sum of all divisors σ(n): 62218271711232
• Sum of proper divisors (its aliquot sum) s(n): 41140108801260
• 21078162909972 is an abundant number, because the sum of its proper divisors (41140108801260) is greater than itself. Its abundance is 20061945891288

Bases of 21078162909972

• Binary: 100110010101110100100011010011010101100010100₂
• Hexadecimal: 0x132BA469AB14
• Base-36: 7GZ69Z310

Squares and roots of 21078162909972

• 21078162909972 squared (21078162909972²) is 444288951659319290977040784
• 21078162909972 cubed (21078162909972³) is 9364794902175806744273297774718764298048
• The square root of 21078162909972 is 4591096.0466942967
• The cube root of 21078162909972 is 27623.4288346895

Scales and comparisons

• 21,078,162,909,972 seconds is equal to 670,220 years, 19 weeks, 5 days, 20 hours, 46 minutes, 12 seconds.
• To count from 1 to 21,078,162,909,972 would take you about one million, six hundred seventy-five thousand, five hundred fifty 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 21078162909972 cubic inches would be around 2302 feet tall.

Recreational maths with 21078162909972

• 21078162909972 backwards is 27990926187012
• 21078162909972 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21078162909972's digits is 63
• More coming soon!