18987321636864

Names of 18987321636864

• Cardinal: 18987321636864 can be written as Eighteen trillion, nine hundred eighty-seven billion, three hundred twenty-one million, six hundred thirty-six thousand, eight hundred sixty-four.

Scientific notation

• Scientific notation: 1.8987321636864 × 10¹³

Factors of 18987321636864

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 18
• Sum of prime factors: 1745

Divisors of 18987321636864

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 28 32 36 42 48 49 56 63 64 72 84 96 98 112 126 128 144 147 168 192 196 224 252 256 288 294 336 343 384 392 441 448 504 512 576 588 672 686 768 784 882 896 1008 1024 1029 1152 1176 1344 1372 1536 1568 1733 1764 1792 2016 2048 2058 2304 2352 2688 2744 3072 3087 3136 3466 3528 3584 4032 4116 4608 4704 5199 5376 5488 6144 6174 6272 6932 7056 7168 8064 8232 9216 9408 10398 10752 10976 12131 12348 12544 13864 14112 14336 15597 16128 16464 18432 18816 20796 21504 21952 24262 24696 25088 27728 28224 31194 32256 32928 36393 37632 41592 43008 43904 48524 49392 50176 55456 56448 62388 64512 65856 72786 75264 83184 84917 87808 97048 98784 100352 109179 110912 112896 124776 129024 131712 145572 150528 166368 169834 175616 194096 197568 218358 221824 225792 249552 254751 263424 291144 301056 332736 339668 351232 388192 395136 436716 443648 451584 499104 509502 526848 582288 594419 665472 679336 702464 764253 776384 790272 873432 887296 903168 998208 1019004 1053696 1164576 1188838 1330944 1358672 1528506 1552768 1580544 1746864 1774592 1783257 1996416 2038008 2107392 2329152 2377676 2661888 2717344 3003289 3057012 3105536 3161088 3493728 3549184 3566514 3992832 4076016 4658304 4755352 5323776 5349771 5434688 6006578 6114024 6211072 6322176 6987456 7133028 7985664 8152032 9009867 9316608 9510704 10647552 10699542 10869376 12013156 12228048 12422144 13974912 14266056 15971328 16304064 18019734 18633216 19021408 21023023 21399084 21738752 24026312 24456096 24844288 27029601 27949824 28532112 31942656 32608128 36039468 37266432 38042816 42046046 42798168 43477504 48052624 48912192 54059202 55899648 57064224 63069069 65216256 72078936 74532864 76085632 84092092 85596336 86955008 96105248 97824384 108118404 111799296 114128448 126138138 130432512 144157872 147161161 152171264 168184184 171192672 173910016 189207207 192210496 195648768 216236808 223598592 228256896 252276276 260865024 288315744 294322322 304342528 336368368 342385344 378414414 384420992 391297536 432473616 441483483 456513792 504552552 521730048 576631488 588644644 608685056 672736736 684770688 756828828 768841984 782595072 864947232 882966966 913027584 1009105104 1030128127 1153262976 1177289288 1217370112 1324450449 1345473472 1369541376 1513657656 1537683968 1565190144 1729894464 1765933932 1826055168 2018210208 2060256254 2306525952 2354578576 2648900898 2690946944 2739082752 3027315312 3075367936 3090384381 3459788928 3531867864 3652110336 4036420416 4120512508 4613051904 4709157152 5297801796 5381893888 5478165504 6054630624 6150735872 6180768762 6919577856 7063735728 8072840832 8241025016 9226103808 9271153143 9418314304 10595603592 10763787776 10956331008 12109261248 12361537524 13839155712 14127471456 16145681664 16482050032 18452207616 18542306286 18836628608 21191207184 21527575552 24218522496 24723075048 27678311424 28254942912 32291363328 32964100064 37084612572 37673257216 42382414368 43055151104 48437044992 49446150096 55356622848 56509885824 64582726656 65928200128 74169225144 75346514432 84764828736 96874089984 98892300192 113019771648 129165453312 131856400256 148338450288 150693028864 169529657472 193748179968 197784600384 226039543296 263712800512 296676900576 301386057728 339059314944 387496359936 395569200768 452079086592 527425601024 593353801152 678118629888 791138401536 904158173184 1054851202048 1186707602304 1356237259776 1582276803072 2109702404096 2373415204608 2712474519552 3164553606144 4746830409216 6329107212288 9493660818432 18987321636864
• Sum of all divisors σ(n): 63988959762000
• Sum of proper divisors (its aliquot sum) s(n): 45001638125136
• 18987321636864 is an abundant number, because the sum of its proper divisors (45001638125136) is greater than itself. Its abundance is 26014316488272

Bases of 18987321636864

• Binary: 100010100010011010100100011111011100000000000₂
• Hexadecimal: 0x1144D48FB800
• Base-36: 6QANL2BK0

Squares and roots of 18987321636864

• 18987321636864 squared (18987321636864²) is 360518382941723808283754496
• 18987321636864 cubed (18987321636864³) is 6845278492916613675024097139570239340544
• The square root of 18987321636864 is 4357444.3928596495
• The cube root of 18987321636864 is 26678.0799095317

Scales and comparisons

• 18,987,321,636,864 seconds is equal to 603,738 years, 5 weeks, 2 hours, 14 minutes, 24 seconds.
• To count from 1 to 18,987,321,636,864 would take you about one million, five hundred nine thousand, three hundred forty-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 18987321636864 cubic inches would be around 2223.2 feet tall.

Recreational maths with 18987321636864

• 18987321636864 backwards is 46863612378981
• 18987321636864 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 18987321636864's digits is 72
• More coming soon!