21305449920

Names of 21305449920

• Cardinal: 21305449920 can be written as Twenty-one billion, three hundred five million, four hundred forty-nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.130544992 × 10¹⁰

Factors of 21305449920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 1941

Divisors of 21305449920

• Number of divisors d(n): 336
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 17 20 24 30 32 34 40 41 48 51 60 64 68 80 82 85 96 102 120 123 136 160 164 170 192 204 205 240 246 255 272 289 320 328 340 408 410 480 492 510 544 578 615 656 680 697 816 820 867 960 984 1020 1088 1156 1230 1312 1360 1394 1445 1632 1640 1734 1873 1968 2040 2091 2312 2460 2624 2720 2788 2890 3264 3280 3468 3485 3746 3936 4080 4182 4335 4624 4920 5440 5576 5619 5780 6560 6936 6970 7492 7872 8160 8364 8670 9248 9365 9840 10455 11152 11238 11560 11849 13120 13872 13940 14984 16320 16728 17340 18496 18730 19680 20910 22304 22476 23120 23698 27744 27880 28095 29968 31841 33456 34680 35547 37460 39360 41820 44608 44952 46240 47396 55488 55760 56190 59245 59936 63682 66912 69360 71094 74920 76793 83640 89904 92480 94792 95523 111520 112380 118490 119872 127364 133824 138720 142188 149840 153586 159205 167280 177735 179808 189584 191046 223040 224760 230379 236980 254728 277440 284376 299680 307172 318410 334560 355470 359616 379168 382092 383965 449520 460758 473960 477615 509456 541297 568752 599360 614344 636820 669120 710940 758336 764184 767930 899040 921516 947920 955230 1018912 1082594 1137504 1151895 1228688 1273640 1305481 1421880 1528368 1535860 1623891 1798080 1843032 1895840 1910460 2037824 2165188 2275008 2303790 2457376 2547280 2610962 2706485 2843760 3056736 3071720 3247782 3686064 3791680 3820920 3916443 4330376 4607580 4914752 5094560 5221924 5412970 5687520 6113472 6143440 6495564 6527405 7372128 7641840 7832886 8119455 8660752 9215160 10189120 10443848 10825940 11375040 12286880 12991128 13054810 14744256 15283680 15665772 16238910 17321504 18430320 19582215 20887696 21651880 22193177 24573760 25982256 26109620 30567360 31331544 32477820 34643008 36860640 39164430 41775392 43303760 44386354 51964512 52219240 62663088 64955640 66579531 73721280 78328860 83550784 86607520 88772708 103929024 104438480 110965885 125326176 129911280 133159062 156657720 173215040 177545416 208876960 221931770 250652352 259822560 266318124 313315440 332897655 355090832 417753920 443863540 519645120 532636248 626630880 665795310 710181664 887727080 1065272496 1253261760 1331590620 1420363328 1775454160 2130544992 2663181240 3550908320 4261089984 5326362480 7101816640 10652724960 21305449920
• Sum of all divisors σ(n): 73649909088
• Sum of proper divisors (its aliquot sum) s(n): 52344459168
• 21305449920 is an abundant number, because the sum of its proper divisors (52344459168) is greater than itself. Its abundance is 31039009248

Bases of 21305449920

• Binary: 10011110101111001110101110111000000₂
• Hexadecimal: 0x4F5E75DC0
• Base-36: 9SCPQDC

Squares and roots of 21305449920

• 21305449920 squared (21305449920²) is 453922196293628006400
• 21305449920 cubed (21305449920³) is 9671016620710301105464639488000
• The square root of 21305449920 is 145963.8651173641
• The cube root of 21305449920 is 2772.2362406391

Scales and comparisons

• 21,305,449,920 seconds is equal to 677 years, 23 weeks, 1 day, 20 hours, 32 minutes.
• To count from 1 to 21,305,449,920 would take you about one thousand, three hundred fifty-four 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 21305449920 cubic inches would be around 231 feet tall.

Recreational maths with 21305449920

• 21305449920 backwards is 02994450312
• The number of decimal digits it has is: 11
• The sum of 21305449920's digits is 39
• More coming soon!