18978127872

Names of 18978127872

• Cardinal: 18978127872 can be written as Eighteen billion, nine hundred seventy-eight million, one hundred twenty-seven thousand, eight hundred seventy-two.

Scientific notation

• Scientific notation: 1.8978127872 × 10¹⁰

Factors of 18978127872

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 18
• Sum of prime factors: 3207

Divisors of 18978127872

• Number of divisors d(n): 180
• Complete list of divisors:
  1 2 3 4 6 8 11 12 16 22 24 32 33 44 48 64 66 88 96 121 128 132 176 192 242 256 264 352 363 384 484 512 528 704 726 768 968 1024 1056 1408 1452 1536 1936 2048 2112 2816 2904 3072 3191 3872 4096 4224 5632 5808 6144 6382 7744 8192 8448 9573 11264 11616 12288 12764 15488 16384 16896 19146 22528 23232 24576 25528 30976 33792 35101 38292 45056 46464 49152 51056 61952 67584 70202 76584 90112 92928 102112 105303 123904 135168 140404 153168 180224 185856 204224 210606 247808 270336 280808 306336 371712 386111 408448 421212 495616 540672 561616 612672 743424 772222 816896 842424 991232 1123232 1158333 1225344 1486848 1544444 1633792 1684848 1982464 2246464 2316666 2450688 2973696 3088888 3267584 3369696 4492928 4633332 4901376 5947392 6177776 6535168 6739392 8985856 9266664 9802752 12355552 13070336 13478784 17971712 18533328 19605504 24711104 26140672 26957568 35943424 37066656 39211008 49422208 52281344 53915136 71886848 74133312 78422016 98844416 107830272 143773696 148266624 156844032 197688832 215660544 287547392 296533248 395377664 431321088 575094784 593066496 790755328 862642176 1186132992 1581510656 1725284352 2372265984 3163021312 4744531968 6326042624 9489063936 18978127872
• Sum of all divisors σ(n): 55643084448
• Sum of proper divisors (its aliquot sum) s(n): 36664956576
• 18978127872 is an abundant number, because the sum of its proper divisors (36664956576) is greater than itself. Its abundance is 17686828704

Bases of 18978127872

• Binary: 10001101011001011110100000000000000₂
• Hexadecimal: 0x46B2F4000
• Base-36: 8PV356O

Squares and roots of 18978127872

• 18978127872 squared (18978127872²) is 360169337525983248384
• 18978127872 cubed (18978127872³) is 6835339743141638210361489358848
• The square root of 18978127872 is 137761.1261278013
• The cube root of 18978127872 is 2667.3773323689

Scales and comparisons

• 18,978,127,872 seconds is equal to 603 years, 23 weeks, 1 day, 6 hours, 11 minutes, 12 seconds.
• To count from 1 to 18,978,127,872 would take you about one thousand, two hundred six 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 18978127872 cubic inches would be around 222.3 feet tall.

Recreational maths with 18978127872

• 18978127872 backwards is 27872187981
• The number of decimal digits it has is: 11
• The sum of 18978127872's digits is 60
• More coming soon!