21078986940

Names of 21078986940

• Cardinal: 21078986940 can be written as Twenty-one billion, seventy-eight million, nine hundred eighty-six thousand, nine hundred forty.

Scientific notation

• Scientific notation: 2.107898694 × 10¹⁰

Factors of 21078986940

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 574

Divisors of 21078986940

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 5 6 9 10 11 12 15 18 20 22 27 30 33 36 44 45 54 55 60 66 71 90 99 108 110 132 135 142 151 165 180 198 213 220 270 284 297 302 330 331 355 396 426 453 495 540 594 604 639 660 662 710 755 781 852 906 990 993 1065 1188 1278 1324 1359 1420 1485 1510 1562 1655 1661 1812 1917 1980 1986 2130 2265 2343 2556 2718 2970 2979 3020 3124 3195 3310 3322 3641 3834 3905 3972 4077 4260 4530 4686 4965 4983 5436 5940 5958 6390 6620 6644 6795 7029 7282 7668 7810 8154 8305 8937 9060 9372 9585 9930 9966 10721 10923 11715 11916 12780 13590 14058 14564 14895 14949 15620 16308 16610 17874 18205 19170 19860 19932 20385 21087 21442 21846 23430 23501 24915 27180 28116 29790 29898 32163 32769 33220 35145 35748 36410 38340 40770 42174 42884 43692 44685 44847 46860 47002 49830 49981 53605 54615 59580 59796 64326 65538 70290 70503 72820 74745 81540 84348 89370 89694 94004 96489 98307 99660 99962 105435 107210 109230 117505 117931 128652 131076 140580 141006 149490 149943 160815 163845 178740 179388 192978 196614 199924 210870 211509 214420 218460 224235 235010 235862 249905 258511 282012 289467 298980 299886 321630 327690 352515 353793 385956 393228 421740 423018 448470 449829 470020 471724 482445 491535 499810 517022 549791 578934 589655 599772 634527 643260 655380 705030 707586 749715 775533 846036 896940 899658 964890 983070 999620 1034044 1057545 1061379 1099582 1157868 1179310 1269054 1292555 1349487 1410060 1415172 1447335 1499430 1551066 1649373 1768965 1799316 1929780 1966140 2115090 2122758 2199164 2249145 2326599 2358620 2538108 2585110 2698974 2748955 2894670 2998860 3102132 3172635 3184137 3298746 3537930 3548651 3877665 4230180 4245516 4498290 4653198 4948119 5170220 5306895 5397948 5497910 5789340 6345270 6368274 6597492 6747435 6979797 7075860 7097302 7755330 8246865 8996580 9306396 9896238 10613790 10645953 10995820 11632995 12690540 12736548 13494870 13959594 14194604 14844357 15510660 15920685 16493730 17743255 19792476 21227580 21291906 23265990 24740595 26989740 27919188 29688714 31841370 31937859 32987460 34898985 35486510 39035161 42583812 46531980 49481190 53229765 59377428 63682740 63875718 69797970 70973020 74221785 78070322 95813577 98962380 106459530 117105483 127751436 139595940 148443570 156140644 159689295 191627154 195175805 212919060 234210966 296887140 319378590 351316449 383254308 390351610 468421932 479067885 585527415 638757180 702632898 780703220 958135770 1053949347 1171054830 1405265796 1756582245 1916271540 2107898694 2342109660 3513164490 4215797388 5269746735 7026328980 10539493470 21078986940
• Sum of all divisors σ(n): 73249505280
• Sum of proper divisors (its aliquot sum) s(n): 52170518340
• 21078986940 is an abundant number, because the sum of its proper divisors (52170518340) is greater than itself. Its abundance is 31091531400

Bases of 21078986940

• Binary: 10011101000011001111101000010111100₂
• Hexadecimal: 0x4E867D0BC
• Base-36: 9OLVUF0

Squares and roots of 21078986940

• 21078986940 squared (21078986940²) is 444323690416690563600
• 21078986940 cubed (21078986940³) is 9365893267426023548145639384000
• The square root of 21078986940 is 145186.0425109797
• The cube root of 21078986940 is 2762.3788800251

Scales and comparisons

• 21,078,986,940 seconds is equal to 670 years, 12 weeks, 5 days, 18 hours, 9 minutes.
• To count from 1 to 21,078,986,940 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 21078986940 cubic inches would be around 230.2 feet tall.

Recreational maths with 21078986940

• 21078986940 backwards is 04968987012
• 21078986940 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21078986940's digits is 54
• More coming soon!