18121968

Names of 18121968

• Cardinal: 18121968 can be written as Eighteen million, one hundred twenty-one thousand, nine hundred sixty-eight.

Scientific notation

• Scientific notation: 1.8121968 × 10⁷

Factors of 18121968

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 143

Divisors of 18121968

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 36 48 54 59 72 79 81 108 118 144 158 162 177 216 236 237 243 316 324 354 432 472 474 486 531 632 648 708 711 944 948 972 1062 1264 1296 1416 1422 1593 1896 1944 2124 2133 2832 2844 3186 3792 3888 4248 4266 4661 4779 5688 6372 6399 8496 8532 9322 9558 11376 12744 12798 13983 14337 17064 18644 19116 19197 25488 25596 27966 28674 34128 37288 38232 38394 41949 51192 55932 57348 74576 76464 76788 83898 102384 111864 114696 125847 153576 167796 223728 229392 251694 307152 335592 377541 503388 671184 755082 1006776 1132623 1510164 2013552 2265246 3020328 4530492 6040656 9060984 18121968
• Sum of all divisors σ(n): 54163200
• Sum of proper divisors (its aliquot sum) s(n): 36041232
• 18121968 is an abundant number, because the sum of its proper divisors (36041232) is greater than itself. Its abundance is 17919264

Bases of 18121968

• Binary: 1000101001000010011110000₂
• Hexadecimal: 0x11484F0
• Base-36: ASF00

Squares and roots of 18121968

• 18121968 squared (18121968²) is 328405724193024
• 18121968 cubed (18121968³) is 5951358024842806751232
• The square root of 18121968 is 4256.9904862473
• The cube root of 18121968 is 262.6647455633

Scales and comparisons

• 18,121,968 seconds is equal to 29 weeks, 6 days, 17 hours, 52 minutes, 48 seconds.
• To count from 1 to 18,121,968 would take you about forty-four weeks!

  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 18121968 cubic inches would be around 21.9 feet tall.

Recreational maths with 18121968

• 18121968 backwards is 86912181
• 18121968 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 18121968's digits is 36
• More coming soon!