21145901920

Names of 21145901920

• Cardinal: 21145901920 can be written as Twenty-one billion, one hundred forty-five million, nine hundred one thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.114590192 × 10¹⁰

Factors of 21145901920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 335

Divisors of 21145901920

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 4 5 8 10 11 13 16 20 22 23 26 32 40 44 46 52 55 65 80 88 92 104 110 115 121 130 143 160 169 176 184 208 220 230 242 253 260 281 286 299 338 352 368 416 440 460 484 506 520 562 572 598 605 676 715 736 845 880 920 968 1012 1040 1124 1144 1196 1210 1265 1352 1405 1430 1495 1573 1690 1760 1840 1859 1936 2024 2080 2248 2288 2392 2420 2530 2704 2783 2810 2860 2990 3091 3146 3289 3380 3653 3680 3718 3872 3887 4048 4496 4576 4784 4840 5060 5408 5566 5620 5720 5980 6182 6292 6463 6578 6760 7306 7436 7774 7865 8096 8992 9295 9568 9680 10120 11132 11240 11440 11960 12364 12584 12926 13156 13520 13915 14612 14872 15455 15548 15730 16445 18265 18590 19360 19435 20240 20449 22264 22480 22880 23920 24728 25168 25852 26312 27040 27830 29224 29744 30910 31096 31460 32315 32890 34001 36179 36530 37180 38870 40183 40480 40898 42757 44528 44960 47489 47840 49456 50336 51704 52624 55660 58448 59488 61820 62192 62920 64630 65780 68002 71093 72358 73060 74360 77740 80366 81796 84019 85514 89056 94978 98912 102245 103408 105248 111320 116896 123640 124384 125840 129260 131560 136004 142186 144716 146120 148720 155480 160732 163592 168038 170005 171028 180895 189956 200915 204490 206816 213785 222640 237445 247280 251680 258520 263120 272008 284372 289432 292240 297440 310960 321464 327184 336076 340010 342056 355465 361790 379912 401830 408980 420095 427570 442013 445280 470327 474890 494560 517040 522379 526240 544016 568744 578864 584480 621920 642928 654368 672152 680020 684112 710930 723580 759824 782023 803660 817960 840190 855140 884026 924209 940654 949780 1034080 1044758 1088032 1092247 1137488 1157728 1285856 1344304 1360040 1368224 1421860 1447160 1519648 1564046 1607320 1635920 1680380 1710280 1768052 1848418 1881308 1899560 2089516 2184494 2210065 2274976 2351635 2611895 2688608 2720080 2843720 2894320 3128092 3214640 3271840 3360760 3420560 3536104 3696836 3762616 3799120 3910115 4179032 4368988 4420130 4621045 4703270 5223790 5440160 5461235 5687440 5746169 5788640 6256184 6429280 6721520 6841120 7072208 7393672 7525232 7598240 7820230 8358064 8737976 8840260 9242090 9406540 10166299 10447580 10922470 11374880 11492338 12014717 12512368 13443040 14144416 14787344 15050464 15640460 16716128 17475952 17680520 18484180 18813080 20332598 20895160 21844940 22984676 24029434 25024736 28730845 29574688 31280920 34951904 35361040 36968360 37626160 40665196 41790320 43689880 45969352 48058868 50831495 57461690 60073585 62561840 70722080 73936720 75252320 81330392 83580640 87379760 91938704 96117736 101662990 114923380 120147170 125123680 132161887 147873440 162660784 174759520 183877408 192235472 203325980 229846760 240294340 264323774 325321568 384470944 406651960 459693520 480588680 528647548 660809435 813303920 919387040 961177360 1057295096 1321618870 1626607840 1922354720 2114590192 2643237740 4229180384 5286475480 10572950960 21145901920
• Sum of all divisors σ(n): 62266561056
• Sum of proper divisors (its aliquot sum) s(n): 41120659136
• 21145901920 is an abundant number, because the sum of its proper divisors (41120659136) is greater than itself. Its abundance is 19974757216

Bases of 21145901920

• Binary: 10011101100011001001101101101100000₂
• Hexadecimal: 0x4EC64DB60
• Base-36: 9PPQ2CG

Squares and roots of 21145901920

• 21145901920 squared (21145901920²) is 447149168010259686400
• 21145901920 cubed (21145901920³) is 9455372450354552882344357888000
• The square root of 21145901920 is 145416.3055506497
• The cube root of 21145901920 is 2765.2988381285

Scales and comparisons

• 21,145,901,920 seconds is equal to 672 years, 19 weeks, 3 days, 5 hours, 38 minutes, 40 seconds.
• To count from 1 to 21,145,901,920 would take you about one thousand, three hundred forty-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 21145901920 cubic inches would be around 230.4 feet tall.

Recreational maths with 21145901920

• 21145901920 backwards is 02910954112
• The number of decimal digits it has is: 11
• The sum of 21145901920's digits is 34
• More coming soon!