21081784320

Names of 21081784320

• Cardinal: 21081784320 can be written as Twenty-one billion, eighty-one million, seven hundred eighty-four thousand, three hundred twenty.

Scientific notation

• Scientific notation: 2.108178432 × 10¹⁰

Factors of 21081784320

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 21
• Sum of prime factors: 56

Divisors of 21081784320

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 17 18 20 24 29 30 32 34 36 40 45 48 51 58 60 64 68 72 80 85 87 90 96 102 116 120 128 136 144 145 153 160 170 174 180 192 204 232 240 255 256 261 272 288 290 306 320 340 348 360 384 408 435 464 480 493 510 512 522 544 576 580 612 640 680 696 720 765 768 816 841 870 928 960 986 1020 1024 1044 1088 1152 1160 1224 1280 1305 1360 1392 1440 1479 1530 1536 1632 1682 1740 1856 1920 1972 2040 2048 2088 2176 2304 2320 2448 2465 2523 2560 2610 2720 2784 2880 2958 3060 3072 3264 3364 3480 3712 3840 3944 4080 4096 4176 4205 4352 4437 4608 4640 4896 4930 5046 5120 5220 5440 5568 5760 5916 6120 6144 6528 6728 6960 7395 7424 7569 7680 7888 8160 8192 8352 8410 8704 8874 9216 9280 9792 9860 10092 10240 10440 10880 11136 11520 11832 12240 12288 12615 13056 13456 13920 14297 14790 14848 15138 15360 15776 16320 16384 16704 16820 17408 17748 18432 18560 19584 19720 20184 20480 20880 21760 22185 22272 23040 23664 24480 24576 25230 26112 26912 27840 28594 29580 29696 30276 30720 31552 32640 32768 33408 33640 34816 35496 36864 37120 37845 39168 39440 40368 40960 41760 42891 43520 44370 44544 46080 47328 48960 49152 50460 52224 53824 55680 57188 59160 59392 60552 61440 63104 65280 66816 67280 69632 70992 71485 73728 74240 75690 78336 78880 80736 81920 83520 85782 87040 88740 89088 92160 94656 97920 98304 100920 104448 107648 111360 114376 118320 118784 121104 122880 126208 128673 130560 133632 134560 139264 141984 142970 147456 148480 151380 156672 157760 161472 163840 167040 171564 174080 177480 178176 184320 189312 195840 201840 208896 214455 215296 222720 228752 236640 237568 242208 245760 252416 257346 261120 267264 269120 278528 283968 285940 294912 296960 302760 313344 315520 322944 334080 343128 348160 354960 356352 368640 378624 391680 403680 417792 428910 430592 445440 457504 473280 475136 484416 491520 504832 514692 522240 534528 538240 557056 567936 571880 593920 605520 626688 631040 643365 645888 668160 686256 696320 709920 712704 737280 757248 783360 807360 835584 857820 861184 890880 915008 946560 950272 968832 1009664 1029384 1044480 1069056 1076480 1135872 1143760 1187840 1211040 1253376 1262080 1286730 1291776 1336320 1372512 1392640 1419840 1425408 1474560 1514496 1566720 1614720 1671168 1715640 1722368 1781760 1830016 1893120 1937664 2019328 2058768 2088960 2138112 2152960 2271744 2287520 2375680 2422080 2506752 2524160 2573460 2583552 2672640 2745024 2785280 2839680 2850816 3028992 3133440 3229440 3431280 3444736 3563520 3660032 3786240 3875328 4038656 4117536 4177920 4276224 4305920 4543488 4575040 4751360 4844160 5013504 5048320 5146920 5167104 5345280 5490048 5679360 6057984 6266880 6458880 6862560 6889472 7127040 7320064 7572480 7750656 8077312 8235072 8355840 8552448 8611840 9086976 9150080 9688320 10096640 10293840 10334208 10690560 10980096 11358720 12115968 12533760 12917760 13725120 13778944 14254080 14640128 15144960 15501312 16154624 16470144 17223680 18173952 18300160 19376640 20193280 20587680 20668416 21381120 21960192 22717440 24231936 25067520 25835520 27450240 27557888 29280256 30289920 31002624 32940288 34447360 36347904 36600320 38753280 40386560 41175360 41336832 42762240 43920384 45434880 48463872 51671040 54900480 58560512 60579840 62005248 65880576 68894720 72695808 73200640 77506560 80773120 82350720 82673664 87840768 90869760 103342080 109800960 117121024 121159680 124010496 131761152 137789440 145391616 146401280 155013120 164701440 175681536 181739520 206684160 219601920 234242048 242319360 248020992 263522304 292802560 310026240 329402880 351363072 363479040 413368320 439203840 468484096 527044608 585605120 620052480 658805760 702726144 726958080 878407680 1054089216 1171210240 1240104960 1317611520 1405452288 1756815360 2108178432 2342420480 2635223040 3513630720 4216356864 5270446080 7027261440 10540892160 21081784320
• Sum of all divisors σ(n): 80141702940
• Sum of proper divisors (its aliquot sum) s(n): 59059918620
• 21081784320 is an abundant number, because the sum of its proper divisors (59059918620) is greater than itself. Its abundance is 37978134300

Bases of 21081784320

• Binary: 10011101000100100101000000000000000₂
• Hexadecimal: 0x4E8928000
• Base-36: 9ONJSW0

Squares and roots of 21081784320

• 21081784320 squared (21081784320²) is 444441630114997862400
• 21081784320 cubed (21081784320³) is 9369622588913601732377837568000
• The square root of 21081784320 is 145195.6759686735
• The cube root of 21081784320 is 2762.5010725137

Scales and comparisons

• 21,081,784,320 seconds is equal to 670 years, 17 weeks, 3 days, 3 hours, 12 minutes.
• To count from 1 to 21,081,784,320 would take you about one thousand, three hundred forty 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 21081784320 cubic inches would be around 230.2 feet tall.

Recreational maths with 21081784320

• 21081784320 backwards is 02348718012
• 21081784320 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21081784320's digits is 36
• More coming soon!