18739920640

Names of 18739920640

• Cardinal: 18739920640 can be written as Eighteen billion, seven hundred thirty-nine million, nine hundred twenty thousand, six hundred forty.

Scientific notation

• Scientific notation: 1.873992064 × 10¹⁰

Factors of 18739920640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 10346

Divisors of 18739920640

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 29 32 35 40 49 56 58 64 70 80 98 112 116 128 140 145 160 196 203 224 232 245 256 280 290 320 392 406 448 464 490 560 580 640 784 812 896 928 980 1015 1120 1160 1280 1421 1568 1624 1792 1856 1960 2030 2240 2320 2842 3136 3248 3712 3920 4060 4480 4640 5684 6272 6496 7105 7424 7840 8120 8960 9280 10303 11368 12544 12992 14210 15680 16240 18560 20606 22736 25984 28420 31360 32480 37120 41212 45472 51515 51968 56840 62720 64960 72121 82424 90944 103030 113680 129920 144242 164848 181888 206060 227360 259840 288484 298787 329696 360605 363776 412120 454720 504847 576968 597574 659392 721210 824240 909440 1009694 1153936 1195148 1318784 1442420 1493935 1648480 1818880 2019388 2091509 2307872 2390296 2524235 2637568 2884840 2987870 3296960 4038776 4183018 4615744 4780592 5048470 5769680 5975740 6593920 8077552 8366036 9231488 9561184 10096940 10457545 11539360 11951480 13187840 14640563 16155104 16732072 18462976 19122368 20193880 20915090 23078720 23902960 29281126 32310208 33464144 38244736 40387760 41830180 46157440 47805920 58562252 64620416 66928288 73202815 76489472 80775520 83660360 92314880 95611840 117124504 129240832 133856576 146405630 161551040 167320720 191223680 234249008 267713152 292811260 323102080 334641440 382447360 468498016 535426304 585622520 646204160 669282880 936996032 1171245040 1338565760 1873992064 2342490080 2677131520 3747984128 4684980160 9369960320 18739920640
• Sum of all divisors σ(n): 54022429440
• Sum of proper divisors (its aliquot sum) s(n): 35282508800
• 18739920640 is an abundant number, because the sum of its proper divisors (35282508800) is greater than itself. Its abundance is 16542588160

Bases of 18739920640

• Binary: 10001011100111111000111111100000000₂
• Hexadecimal: 0x45CFC7F00
• Base-36: 8LX9JB4

Squares and roots of 18739920640

• 18739920640 squared (18739920640²) is 351184625593498009600
• 18739920640 cubed (18739920640³) is 6581172013610265599901958144000
• The square root of 18739920640 is 136893.8298098203
• The cube root of 18739920640 is 2656.1702968177

Scales and comparisons

• 18,739,920,640 seconds is equal to 595 years, 45 weeks, 2 days, 5 hours, 30 minutes, 40 seconds.
• To count from 1 to 18,739,920,640 would take you about one thousand, one hundred ninety-one 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 18739920640 cubic inches would be around 221.3 feet tall.

Recreational maths with 18739920640

• 18739920640 backwards is 04602993781
• 18739920640 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18739920640's digits is 49
• More coming soon!