19998729920

Names of 19998729920

• Cardinal: 19998729920 can be written as Nineteen billion, nine hundred ninety-eight million, seven hundred twenty-nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 1.999872992 × 10¹⁰

Factors of 19998729920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 281

Divisors of 19998729920

• Number of divisors d(n): 336
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 26 31 32 40 52 62 64 65 79 80 104 124 130 151 155 158 160 169 208 248 260 302 310 316 320 338 395 403 416 496 520 604 620 632 676 755 790 806 832 845 992 1027 1040 1208 1240 1264 1352 1510 1580 1612 1690 1963 1984 2015 2054 2080 2416 2449 2480 2528 2704 3020 3160 3224 3380 3926 4030 4108 4160 4681 4832 4898 4960 5056 5135 5239 5408 6040 6320 6448 6760 7852 8060 8216 9362 9664 9796 9815 9920 10270 10478 10816 11929 12080 12245 12640 12896 13351 13520 15704 16120 16432 18724 19592 19630 20540 20956 23405 23858 24160 24490 25280 25519 25792 26195 26702 27040 31408 31837 32240 32864 37448 39184 39260 41080 41912 46810 47716 48320 48980 51038 52390 53404 54080 59645 60853 62816 63674 64480 65728 66755 74896 78368 78520 82160 83824 93620 95432 97960 102076 104780 106808 119290 121706 125632 127348 127595 128960 133510 149792 155077 156736 157040 159185 164320 167648 187240 190864 195920 204152 209560 213616 238580 243412 254696 255190 267020 299584 304265 310154 314080 318370 328640 335296 369799 374480 381728 391840 408304 413881 419120 427232 477160 486824 509392 510380 534040 608530 620308 628160 636740 739598 748960 763456 775385 783680 791089 816608 827762 838240 854464 954320 973648 1018784 1020760 1068080 1217060 1240616 1273480 1479196 1497920 1550770 1582178 1633216 1655524 1676480 1848995 1908640 1947296 2016001 2037568 2041520 2069405 2136160 2434120 2481232 2546960 2958392 3101540 3164356 3311048 3697990 3817280 3894592 3955445 4032002 4083040 4138810 4272320 4807387 4868240 4962464 5093920 5916784 6203080 6328712 6622096 7395980 7910890 8064004 8166080 8277620 9614774 9736480 9924928 10080005 10187840 11833568 12406160 12657424 13244192 14791960 15821780 16128008 16555240 19229548 19472960 20160010 23667136 24036935 24812320 25314848 26488384 29583920 31643560 32256016 33110480 38459096 40320020 48073870 49624640 50629696 59167840 62496031 63287120 64512032 66220960 76918192 80640040 96147740 118335680 124992062 126574240 129024064 132441920 153836384 161280080 192295480 249984124 253148480 307672768 312480155 322560160 384590960 499968248 624960310 645120320 769181920 999936496 1249920620 1538363840 1999872992 2499841240 3999745984 4999682480 9999364960 19998729920
• Sum of all divisors σ(n): 54261227520
• Sum of proper divisors (its aliquot sum) s(n): 34262497600
• 19998729920 is an abundant number, because the sum of its proper divisors (34262497600) is greater than itself. Its abundance is 14263767680

Bases of 19998729920

• Binary: 10010101000000001000110011011000000₂
• Hexadecimal: 0x4A80466C0
• Base-36: 96QQ6RK

Squares and roots of 19998729920

• 19998729920 squared (19998729920²) is 399949198413103206400
• 19998729920 cubed (19998729920³) is 7998476000784143613879615488000
• The square root of 19998729920 is 141416.8657551143
• The cube root of 19998729920 is 2714.3601565865

Scales and comparisons

• 19,998,729,920 seconds is equal to 635 years, 46 weeks, 4 days, 18 hours, 45 minutes, 20 seconds.
• To count from 1 to 19,998,729,920 would take you about one thousand, two hundred seventy-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 19998729920 cubic inches would be around 226.2 feet tall.

Recreational maths with 19998729920

• 19998729920 backwards is 02992789991
• 19998729920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 19998729920's digits is 65
• More coming soon!