21538264378015

Names of 21538264378015

• Cardinal: 21538264378015 can be written as Twenty-one trillion, five hundred thirty-eight billion, two hundred sixty-four million, three hundred seventy-eight thousand and fifteen.

Scientific notation

• Scientific notation: 2.1538264378015 × 10¹³

Factors of 21538264378015

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1327

Divisors of 21538264378015

• Number of divisors d(n): 288
• Complete list of divisors:
  1 5 7 11 23 35 41 53 55 77 115 161 205 253 265 287 371 385 451 529 583 805 943 1187 1219 1265 1435 1681 1771 1855 2173 2255 2645 2915 3157 3703 4081 4715 5819 5935 6095 6601 8309 8405 8533 8855 10373 10865 11767 13057 13409 15211 15785 18491 18515 20405 21689 23903 27301 28037 29095 33005 38663 40733 41545 42665 48667 49979 51865 58835 62911 65285 67045 72611 76055 89093 91399 92455 93863 108445 119515 129437 136505 140185 151823 167321 191107 193315 196259 203665 238579 243335 249895 270641 300311 308407 314555 340669 349853 363055 425293 440377 445465 456995 469315 535337 549769 623651 627923 647185 692021 759115 836605 889249 955535 980023 981295 1119341 1149517 1192895 1353205 1446953 1501555 1542035 1670053 1703345 1749265 1995347 2049139 2102177 2126465 2158849 2201885 2579351 2676685 2748845 2977051 3118255 3139615 3460105 3747359 3848383 4395461 4446245 4844147 4900115 5596705 5747585 6224743 6860161 6907153 7234765 7835387 8046619 8350265 9781739 9976735 10128671 10245695 10510885 10794245 12312751 12644687 12896755 13967429 14343973 14885255 15916483 18055457 18736795 19241915 21948817 21977305 22540529 24220735 25744843 28372861 31123715 33279919 34300805 34535765 39176935 40233095 45892981 47130197 48350071 48908695 50643355 59325073 61563755 63223435 68472173 69837145 71719865 79582415 86189257 88512809 90277285 105753391 109744085 111415381 112702645 128724215 141864305 153641719 157783703 166399595 180213901 198610027 229464905 232959433 235650985 241750355 283193273 296625365 321250867 329911379 342360865 366079109 415275511 430946285 442564045 504822791 518432167 528766955 557076905 652575803 740273737 768208595 788918515 901069505 993050135 1055538563 1163287301 1164797165 1364476679 1415966365 1606254335 1649556895 1830395545 1982352911 2076377555 2432327993 2524113955 2562553763 2592160835 3262879015 3533759537 3629025169 3701368685 4568030621 5277692815 5816436505 6822383395 7388769941 8143011107 9551336753 9911764555 11610924193 12161639965 12812768815 15009243469 17026295951 17668797685 18145125845 22840153105 26755607923 36943849705 40715055535 47756683765 55943543839 58054620965 75046217345 81276469351 85131479755 105064704283 133778039615 187289255461 279717719195 391604806873 406382346755 525323521415 615378982229 936446277305 1958024034365 3076894911145 4307652875603 21538264378015
• Sum of all divisors σ(n): 35208140825088
• Sum of proper divisors (its aliquot sum) s(n): 13669876447073
• 21538264378015 is a deficient number, because the sum of its proper divisors (13669876447073) is less than itself. Its deficiency is 7868387930942

Bases of 21538264378015

• Binary: 100111001011011000100100110001110101010011111₂
• Hexadecimal: 0x1396C498EA9F
• Base-36: 7MUJIIBVJ

Squares and roots of 21538264378015

• 21538264378015 squared (21538264378015²) is 463896832417269874815340225
• 21538264378015 cubed (21538264378015³) is 9991532620726877829234020744190235153375
• The square root of 21538264378015 is 4640933.5675071885
• The cube root of 21538264378015 is 27822.9751490495

Scales and comparisons

• 21,538,264,378,015 seconds is equal to 684,850 years, 9 weeks, 4 days, 8 hours, 6 minutes, 55 seconds.
• To count from 1 to 21,538,264,378,015 would take you about one million, seven hundred twelve thousand, one hundred twenty-five 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 21538264378015 cubic inches would be around 2318.6 feet tall.

Recreational maths with 21538264378015

• 21538264378015 backwards is 51087346283512
• 21538264378015 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21538264378015's digits is 55
• More coming soon!