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20031704880 = 2435112689797
BaseRepresentation
bin10010101001111110…
…111000111100110000
31220201001012001011120
4102221332320330300
5312011104024010
613111420542240
71306255452645
oct225176707460
956631161146
1020031704880
11854a414400
123a706b1980
131b73128915
14d805b9dcc
157c392ee70
hex4a9fb8f30

20031704880 has 120 divisors (see below), whose sum is σ = 68256891696. Its totient is φ = 4856163840.

The previous prime is 20031704863. The next prime is 20031704909. The reversal of 20031704880 is 8840713002.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315859 + ... + 373938.

Almost surely, 220031704880 is an apocalyptic number.

20031704880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031704880 is an abundant number, since it is smaller than the sum of its proper divisors (48225186816).

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

20031704880 is a wasteful number, since it uses less digits than its factorization.

20031704880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689835 (or 689818 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The spelling of 20031704880 in words is "twenty billion, thirty-one million, seven hundred four thousand, eight hundred eighty".

Divisors: 1 2 3 4 5 6 8 10 11 12 15 16 20 22 24 30 33 40 44 48 55 60 66 80 88 110 120 121 132 165 176 220 240 242 264 330 363 440 484 528 605 660 726 880 968 1210 1320 1452 1815 1936 2420 2640 2904 3630 4840 5808 7260 9680 14520 29040 689797 1379594 2069391 2759188 3448985 4138782 5518376 6897970 7587767 8277564 10346955 11036752 13795940 15175534 16555128 20693910 22763301 27591880 30351068 33110256 37938835 41387820 45526602 55183760 60702136 75877670 82775640 83465437 91053204 113816505 121404272 151755340 165551280 166930874 182106408 227633010 250396311 303510680 333861748 364212816 417327185 455266020 500792622 607021360 667723496 834654370 910532040 1001585244 1251981555 1335446992 1669308740 1821064080 2003170488 2503963110 3338617480 4006340976 5007926220 6677234960 10015852440 20031704880