21005147520

Names of 21005147520

• Cardinal: 21005147520 can be written as Twenty-one billion, five million, one hundred forty-seven thousand, five hundred twenty.

Scientific notation

• Scientific notation: 2.100514752 × 10¹⁰

Factors of 21005147520

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 3953

Divisors of 21005147520

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 19 20 21 24 28 30 32 35 36 38 40 42 45 48 49 56 57 60 63 64 70 72 76 80 84 90 95 96 98 105 112 114 120 126 128 133 140 144 147 152 160 168 171 180 190 192 196 210 224 228 240 245 252 266 280 285 288 294 304 315 320 336 342 360 380 384 392 399 420 441 448 456 480 490 504 532 560 570 576 588 608 630 640 665 672 684 720 735 760 784 798 840 855 882 896 912 931 960 980 1008 1064 1120 1140 1152 1176 1197 1216 1260 1330 1344 1368 1440 1470 1520 1568 1596 1680 1710 1764 1824 1862 1920 1960 1995 2016 2128 2205 2240 2280 2352 2394 2432 2520 2660 2688 2736 2793 2880 2940 3040 3136 3192 3360 3420 3528 3648 3724 3917 3920 3990 4032 4256 4410 4480 4560 4655 4704 4788 5040 5320 5472 5586 5760 5880 5985 6080 6272 6384 6720 6840 7056 7296 7448 7834 7840 7980 8064 8379 8512 8820 9120 9310 9408 9576 10080 10640 10944 11172 11751 11760 11970 12160 12768 13440 13680 13965 14112 14896 15668 15680 15960 16758 17024 17640 18240 18620 18816 19152 19585 20160 21280 21888 22344 23502 23520 23940 25536 27360 27419 27930 28224 29792 31336 31360 31920 33516 35253 35280 36480 37240 38304 39170 40320 41895 42560 44688 47004 47040 47880 51072 54720 54838 55860 56448 58755 59584 62672 63840 67032 70506 70560 74423 74480 76608 78340 82257 83790 85120 89376 94008 94080 95760 109440 109676 111720 117510 119168 125344 127680 134064 137095 141012 141120 148846 148960 153216 156680 164514 167580 176265 178752 188016 191520 191933 219352 223269 223440 235020 246771 250688 255360 268128 274190 282024 282240 297692 297920 313360 329028 335160 352530 357504 372115 376032 383040 383866 411285 438704 446538 446880 470040 493542 501376 520961 536256 548380 564048 575799 595384 595840 626720 658056 669807 670320 705060 744230 752064 766080 767732 822570 877408 893076 893760 940080 959665 987084 1041922 1072512 1096760 1116345 1128096 1151598 1190768 1233855 1253440 1316112 1339614 1340640 1410120 1488460 1504128 1535464 1562883 1645140 1727397 1754816 1786152 1787520 1880160 1919330 1974168 2083844 2193520 2232690 2256192 2303196 2381536 2467710 2506880 2604805 2632224 2679228 2681280 2820240 2878995 2976920 3070928 3125766 3290280 3349035 3454794 3509632 3572304 3646727 3760320 3838660 3948336 4167688 4387040 4465380 4512384 4606392 4688649 4763072 4935420 5209610 5264448 5358456 5362560 5640480 5757990 5953840 6141856 6251532 6580560 6698070 6909588 7144608 7293454 7520640 7677320 7814415 7896672 8335376 8636985 8774080 8930760 9212784 9377298 9526144 9870840 10419220 10528896 10716912 10940181 11280960 11515980 11907680 12283712 12503064 13161120 13396140 13819176 14289216 14586908 15354640 15628830 15793344 16670752 17273970 17548160 17861520 18233635 18425568 18754596 19741680 20838440 21433824 21880362 22561920 23031960 23443245 23815360 24567424 25006128 26322240 26792280 27638352 28578432 29173816 30709280 31257660 31586688 32820543 33341504 34547940 35723040 36467270 36851136 37509192 39483360 41676880 42867648 43760724 46063920 46886490 47630720 50012256 52644480 53584560 54700905 55276704 58347632 61418560 62515320 65641086 66683008 69095880 71446080 72934540 73702272 75018384 78966720 83353760 85735296 87521448 92127840 93772980 100024512 107169120 109401810 110553408 116695264 122837120 125030640 131282172 138191760 142892160 145869080 150036768 157933440 164102715 166707520 175042896 184255680 187545960 200049024 214338240 218803620 221106816 233390528 250061280 262564344 276383520 291738160 300073536 328205430 333415040 350085792 368511360 375091920 428676480 437607240 466781056 500122560 525128688 552767040 583476320 600147072 656410860 700171584 750183840 875214480 1000245120 1050257376 1105534080 1166952640 1312821720 1400343168 1500367680 1750428960 2100514752 2333905280 2625643440 3000735360 3500857920 4201029504 5251286880 7001715840 10502573760 21005147520
• Sum of all divisors σ(n): 88839082800
• Sum of proper divisors (its aliquot sum) s(n): 67833935280
• 21005147520 is an abundant number, because the sum of its proper divisors (67833935280) is greater than itself. Its abundance is 46828787760

Bases of 21005147520

• Binary: 10011100100000000010001110110000000₂
• Hexadecimal: 0x4E4011D80
• Base-36: 9NDX7K0

Squares and roots of 21005147520

• 21005147520 squared (21005147520²) is 441216222336962150400
• 21005147520 cubed (21005147520³) is 9267811838405009117808427008000
• The square root of 21005147520 is 144931.5270049965
• The cube root of 21005147520 is 2759.1495804631

Scales and comparisons

• 21,005,147,520 seconds is equal to 667 years, 46 weeks, 5 days, 3 hours, 12 minutes.
• To count from 1 to 21,005,147,520 would take you about one thousand, three hundred thirty-five 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 21005147520 cubic inches would be around 229.9 feet tall.

Recreational maths with 21005147520

• 21005147520 backwards is 02574150012
• The number of decimal digits it has is: 11
• The sum of 21005147520's digits is 27
• More coming soon!