21118907858391

Names of 21118907858391

• Cardinal: 21118907858391 can be written as Twenty-one trillion, one hundred eighteen billion, nine hundred seven million, eight hundred fifty-eight thousand, three hundred ninety-one.

Scientific notation

• Scientific notation: 2.1118907858391 × 10¹³

Factors of 21118907858391

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 20
• Sum of prime factors: 623

Divisors of 21118907858391

• Number of divisors d(n): 160
• Complete list of divisors:
  1 3 7 9 21 27 49 63 81 147 189 243 343 441 567 613 729 1029 1323 1701 1839 2187 2401 3087 3969 4291 5103 5517 6561 7203 9261 11907 12873 15309 16551 19683 21609 27783 30037 35721 38619 45927 49653 59049 64827 83349 90111 107163 115857 137781 148959 177147 194481 210259 250047 270333 321489 347571 413343 446877 531441 583443 630777 750141 810999 964467 1042713 1240029 1340631 1471813 1594323 1750329 1892331 2250423 2432997 2893401 3128139 3720087 4021893 4415439 4782969 5250987 5676993 6751269 7298991 8680203 9384417 11160261 12065679 13246317 14348907 15752961 17030979 20253807 21896973 26040609 28153251 33480783 36197037 39738951 47258883 51092937 60761421 65690919 78121827 84459753 100442349 108591111 119216853 141776649 153278811 182284263 197072757 234365481 253379259 325773333 357650559 425329947 459836433 546852789 591218271 703096443 760137777 977319999 1072951677 1275989841 1379509299 1640558367 1773654813 2280413331 2931959997 3218855031 3827969523 4138527897 4921675101 5320964439 6841239993 8795879991 9656565093 11483908569 12415583691 15962893317 20523719979 28969695279 34451725707 37246751073 47888679951 61571159937 86909085837 111740253219 143666039853 260727257511 335220759657 430998119559 782181772533 1005662278971 2346545317599 3016986836913 7039635952797 21118907858391
• Sum of all divisors σ(n): 37016175855040
• Sum of proper divisors (its aliquot sum) s(n): 15897267996649
• 21118907858391 is a deficient number, because the sum of its proper divisors (15897267996649) is less than itself. Its deficiency is 5221639861742

Bases of 21118907858391

• Binary: 100110011010100100001000000000011110111010111₂
• Hexadecimal: 0x133521003DD7
• Base-36: 7HHW4GQFR

Squares and roots of 21118907858391

• 21118907858391 squared (21118907858391²) is 446008269131209134109108881
• 21118907858391 cubed (21118907858391³) is 9419207539862460648608538147765148470471
• The square root of 21118907858391 is 4595531.2922872149
• The cube root of 21118907858391 is 27641.2164496635

Scales and comparisons

• 21,118,907,858,391 seconds is equal to 671,515 years, 49 weeks, 21 hours, 59 minutes, 51 seconds.
• To count from 1 to 21,118,907,858,391 would take you about one million, six hundred seventy-eight thousand, seven hundred eighty-nine 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 21118907858391 cubic inches would be around 2303.4 feet tall.

Recreational maths with 21118907858391

• 21118907858391 backwards is 19385870981112
• 21118907858391 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21118907858391's digits is 63
• More coming soon!