18898994690

Names of 18898994690

• Cardinal: 18898994690 can be written as Eighteen billion, eight hundred ninety-eight million, nine hundred ninety-four thousand, six hundred ninety.

Scientific notation

• Scientific notation: 1.889899469 × 10¹⁰

Factors of 18898994690

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2004

Divisors of 18898994690

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 5 10 17 31 34 41 47 62 82 85 94 155 170 205 235 310 410 470 527 697 799 1054 1271 1394 1457 1598 1861 1927 2542 2635 2914 3485 3722 3854 3995 5270 6355 6970 7285 7990 9305 9635 12710 14570 18610 19270 21607 24769 31637 32759 43214 49538 57691 59737 63274 65518 76301 87467 108035 115382 119474 123845 152602 158185 163795 174934 216070 247690 288455 298685 316370 327590 381505 437335 576910 597370 763010 874670 980747 1015529 1297117 1486939 1961494 2031058 2365331 2594234 2711477 2973878 3586147 4730662 4903735 5077645 5422954 6485585 7172294 7434695 9807470 10155290 11826655 12971170 13557385 14869390 17930735 23653310 27114770 35861470 40210627 46095109 60964499 80421254 92190218 111170557 121928998 201053135 222341114 230475545 304822495 402106270 460951090 555852785 609644990 1111705570 1889899469 3779798938 9449497345 18898994690
• Sum of all divisors σ(n): 38919315456
• Sum of proper divisors (its aliquot sum) s(n): 20020320766
• 18898994690 is an abundant number, because the sum of its proper divisors (20020320766) is greater than itself. Its abundance is 1121326076

Bases of 18898994690

• Binary: 10001100110011101111100011000000010₂
• Hexadecimal: 0x46677C602
• Base-36: 8OJZ1MQ

Squares and roots of 18898994690

• 18898994690 squared (18898994690²) is 357172000292648196100
• 18898994690 cubed (18898994690³) is 6750191736947436704131978709000
• The square root of 18898994690 is 137473.6145229331
• The cube root of 18898994690 is 2663.6647758839

Scales and comparisons

• 18,898,994,690 seconds is equal to 600 years, 48 weeks, 2 days, 8 hours, 44 minutes, 50 seconds.
• To count from 1 to 18,898,994,690 would take you about one thousand, two hundred 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 18898994690 cubic inches would be around 222 feet tall.

Recreational maths with 18898994690

• 18898994690 backwards is 09649989881
• The number of decimal digits it has is: 11
• The sum of 18898994690's digits is 71
• More coming soon!