18668021440

Names of 18668021440

• Cardinal: 18668021440 can be written as Eighteen billion, six hundred sixty-eight million, twenty-one thousand, four hundred forty.

Scientific notation

• Scientific notation: 1.866802144 × 10¹⁰

Factors of 18668021440

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 537

Divisors of 18668021440

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 4 5 8 10 16 20 31 32 37 40 62 64 74 80 124 148 155 160 181 185 248 281 296 310 320 362 370 496 562 592 620 724 740 905 992 1124 1147 1184 1240 1405 1448 1480 1810 1984 2248 2294 2368 2480 2810 2896 2960 3620 4496 4588 4960 5611 5620 5735 5792 5920 6697 7240 8711 8992 9176 9920 10397 11222 11240 11470 11584 11840 13394 14480 17422 17984 18352 20794 22444 22480 22940 26788 28055 28960 33485 34844 36704 41588 43555 44888 44960 45880 50861 51985 53576 56110 57920 66970 69688 73408 83176 87110 89776 89920 91760 101722 103970 107152 112220 133940 139376 166352 174220 179552 183520 203444 207607 207940 214304 224440 254305 267880 278752 322307 332704 348440 359104 367040 406888 415214 415880 428608 448880 508610 535760 557504 644614 665408 696880 813776 830428 831760 897760 1017220 1038035 1071520 1289228 1393760 1576691 1611535 1627552 1660856 1663520 1795520 1881857 2034440 2076070 2143040 2578456 2787520 3153382 3223070 3255104 3321712 3327040 3763714 4068880 4152140 5156912 6306764 6446140 6643424 7527428 7883455 8137760 8304280 9409285 10313824 12613528 12892280 13286848 15054856 15766910 16275520 16608560 18818570 20627648 25227056 25784560 30109712 31533820 33217120 37637140 50454112 51569120 58337567 60219424 63067640 66434240 75274280 100908224 103138240 116675134 120438848 126135280 150548560 233350268 252270560 291687835 301097120 466700536 504541120 583375670 602194240 933401072 1166751340 1866802144 2333502680 3733604288 4667005360 9334010720 18668021440
• Sum of all divisors σ(n): 47556407808
• Sum of proper divisors (its aliquot sum) s(n): 28888386368
• 18668021440 is an abundant number, because the sum of its proper divisors (28888386368) is greater than itself. Its abundance is 10220364928

Bases of 18668021440

• Binary: 10001011000101100110110011011000000₂
• Hexadecimal: 0x458B366C0
• Base-36: 8KQGHJ4

Squares and roots of 18668021440

• 18668021440 squared (18668021440²) is 348495024484299673600
• 18668021440 cubed (18668021440³) is 6505712588806231250149801984000
• The square root of 18668021440 is 136630.9680855699
• The cube root of 18668021440 is 2652.7689789571

Scales and comparisons

• 18,668,021,440 seconds is equal to 593 years, 30 weeks, 3 days, 1 hour, 30 minutes, 40 seconds.
• To count from 1 to 18,668,021,440 would take you about one thousand, one hundred eighty-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 18668021440 cubic inches would be around 221.1 feet tall.

Recreational maths with 18668021440

• 18668021440 backwards is 04412086681
• 18668021440 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18668021440's digits is 40
• More coming soon!