18991816128

Names of 18991816128

• Cardinal: 18991816128 can be written as Eighteen billion, nine hundred ninety-one million, eight hundred sixteen thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 1.8991816128 × 10¹⁰

Factors of 18991816128

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 491

Divisors of 18991816128

• Number of divisors d(n): 336
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 23 24 32 36 46 48 61 64 69 71 72 92 96 122 138 142 144 183 184 192 207 213 244 276 284 288 331 366 368 414 426 488 549 552 568 576 639 662 732 736 828 852 976 993 1098 1104 1136 1278 1324 1403 1464 1472 1633 1656 1704 1952 1986 2196 2208 2272 2556 2648 2806 2928 2979 3266 3312 3408 3904 3972 4209 4331 4392 4416 4544 4899 5112 5296 5612 5856 5958 6532 6624 6816 7613 7944 8418 8662 8784 9798 10224 10592 11224 11712 11916 12627 12993 13064 13248 13632 14697 15226 15888 16836 17324 17568 19596 20191 20448 21184 22448 22839 23501 23832 25254 25986 26128 29394 30452 31776 33672 34648 35136 38979 39192 40382 40896 44896 45678 47002 47664 50508 51972 52256 58788 60573 60904 63552 67344 68517 69296 70503 77958 78384 80764 89792 91356 94004 95328 99613 101016 103944 104512 117576 121146 121808 134688 137034 138592 141006 155916 156768 161528 181719 182712 188008 190656 199226 202032 207888 211509 235152 242292 243616 269376 274068 277184 282012 298839 311832 313536 323056 363438 365424 376016 398452 404064 415776 423018 464393 470304 484584 487232 540523 548136 564024 597678 623664 646112 726876 730848 752032 796904 808128 831552 846036 896517 928786 940608 969168 1081046 1096272 1128048 1195356 1247328 1292224 1393179 1433561 1453752 1461696 1504064 1593808 1621569 1692072 1793034 1857572 1938336 2162092 2192544 2256096 2390712 2494656 2786358 2867122 2907504 3187616 3243138 3384144 3586068 3715144 3876672 4179537 4300683 4324184 4385088 4512192 4781424 4864707 5572716 5734244 5815008 6375232 6486276 6768288 7172136 7430288 8359074 8601366 8648368 9562848 9729414 11145432 11468488 11630016 12902049 12972552 13536576 14344272 14860576 16718148 17202732 17296736 19125696 19458828 22290864 22936976 25804098 25945104 28688544 29721152 32971903 33436296 34405464 34593472 38917656 44581728 45873952 51608196 51890208 57377088 65943806 66872592 68810928 77835312 89163456 91747904 98915709 103216392 103780416 131887612 133745184 137621856 155670624 197831418 206432784 263775224 267490368 275243712 296747127 311341248 395662836 412865568 527550448 593494254 791325672 825731136 1055100896 1186988508 1582651344 2110201792 2373977016 3165302688 4747954032 6330605376 9495908064 18991816128
• Sum of all divisors σ(n): 58724669952
• Sum of proper divisors (its aliquot sum) s(n): 39732853824
• 18991816128 is an abundant number, because the sum of its proper divisors (39732853824) is greater than itself. Its abundance is 20741037696

Bases of 18991816128

• Binary: 10001101100000000000001110111000000₂
• Hexadecimal: 0x46C001DC0
• Base-36: 8Q38J40

Squares and roots of 18991816128

• 18991816128 squared (18991816128²) is 360689079839760912384
• 18991816128 cubed (18991816128³) is 6850140683694250951478446129152
• The square root of 18991816128 is 137810.7982996977
• The cube root of 18991816128 is 2668.0184733939

Scales and comparisons

• 18,991,816,128 seconds is equal to 603 years, 45 weeks, 5 days, 16 hours, 28 minutes, 48 seconds.
• To count from 1 to 18,991,816,128 would take you about one thousand, two hundred seven 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 18991816128 cubic inches would be around 222.3 feet tall.

Recreational maths with 18991816128

• 18991816128 backwards is 82161819981
• The number of decimal digits it has is: 11
• The sum of 18991816128's digits is 54
• More coming soon!