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19956659520 = 263572969741
BaseRepresentation
bin10010100101100000…
…100111010101000000
31220111210222100021210
4102211200213111000
5311332401101040
613100140250120
71304354543550
oct224540472500
956453870253
1019956659520
118511017746
123a4b540940
131b60711795
14d74643160
157bc059480
hex4a5827540

19956659520 has 112 divisors (see below), whose sum is σ = 72414188928. Its totient is φ = 4561520640.

The previous prime is 19956659509. The next prime is 19956659531. The reversal of 19956659520 is 2595665991.

It is an interprime number because it is at equal distance from previous prime (19956659509) and next prime (19956659531).

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1478151 + ... + 1491590.

Almost surely, 219956659520 is an apocalyptic number.

19956659520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19956659520 is an abundant number, since it is smaller than the sum of its proper divisors (52457529408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19956659520 is a wasteful number, since it uses less digits than its factorization.

19956659520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2969768 (or 2969758 counting only the distinct ones).

The product of its (nonzero) digits is 6561000, while the sum is 57.

The spelling of 19956659520 in words is "nineteen billion, nine hundred fifty-six million, six hundred fifty-nine thousand, five hundred twenty".

Divisors: 1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 32 35 40 42 48 56 60 64 70 80 84 96 105 112 120 140 160 168 192 210 224 240 280 320 336 420 448 480 560 672 840 960 1120 1344 1680 2240 3360 6720 2969741 5939482 8909223 11878964 14848705 17818446 20788187 23757928 29697410 35636892 41576374 44546115 47515856 59394820 62364561 71273784 83152748 89092230 95031712 103940935 118789640 124729122 142547568 166305496 178184460 190063424 207881870 237579280 249458244 285095136 311822805 332610992 356368920 415763740 475158560 498916488 570190272 623645610 665221984 712737840 831527480 950317120 997832976 1247291220 1330443968 1425475680 1663054960 1995665952 2494582440 2850951360 3326109920 3991331904 4989164880 6652219840 9978329760 19956659520