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18371748304 = 2471379159721
BaseRepresentation
bin10001000111000010…
…101010000111010000
31202102100200111211101
4101013002222013100
5300111131421204
612235002154144
71220161166260
oct210702520720
952370614741
1018371748304
117878411468
1236887b2954
13196a25c8b0
14c63d597a0
15727d3aea4
hex4470aa1d0

18371748304 has 80 divisors (see below), whose sum is σ = 44364382720. Its totient is φ = 7175900160.

The previous prime is 18371748301. The next prime is 18371748313. The reversal of 18371748304 is 40384717381.

It is a super-2 number, since 2×183717483042 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18371748301) by changing a digit.

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, 35164 + ... + 194884.

It is an arithmetic number, because the mean of its divisors is an integer number (554554784).

Almost surely, 218371748304 is an apocalyptic number.

18371748304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18371748304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22182191360).

18371748304 is an abundant number, since it is smaller than the sum of its proper divisors (25992634416).

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

18371748304 is a wasteful number, since it uses less digits than its factorization.

18371748304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159828 (or 159822 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 18371748304 in words is "eighteen billion, three hundred seventy-one million, seven hundred forty-eight thousand, three hundred four".

Divisors: 1 2 4 7 8 13 14 16 26 28 52 56 79 91 104 112 158 182 208 316 364 553 632 728 1027 1106 1264 1456 2054 2212 4108 4424 7189 8216 8848 14378 16432 28756 57512 115024 159721 319442 638884 1118047 1277768 2076373 2236094 2555536 4152746 4472188 8305492 8944376 12617959 14534611 16610984 17888752 25235918 29069222 33221968 50471836 58138444 88325713 100943672 116276888 164033467 176651426 201887344 232553776 328066934 353302852 656133868 706605704 1148234269 1312267736 1413211408 2296468538 2624535472 4592937076 9185874152 18371748304