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18104752680 = 233571923313743
BaseRepresentation
bin10000110111001000…
…001001101000101000
31201201202021201200120
4100313020021220220
5244034304041210
612152303403240
71210436600340
oct206710115050
951652251616
1018104752680
11775072a723
1236132b3520
131926b49411
14c3a6d7d20
1570e69b270
hex437209a28

18104752680 has 1024 divisors, whose sum is σ = 73963929600. Its totient is φ = 3448811520.

The previous prime is 18104752619. The next prime is 18104752697. The reversal of 18104752680 is 8625740181.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 255 ways as a sum of consecutive naturals, for example, 421040739 + ... + 421040781.

It is an arithmetic number, because the mean of its divisors is an integer number (72230400).

Almost surely, 218104752680 is an apocalyptic number.

18104752680 is a gapful number since it is divisible by the number (10) 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 18104752680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36981964800).

18104752680 is an abundant number, since it is smaller than the sum of its proper divisors (55859176920).

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

18104752680 is a wasteful number, since it uses less digits than its factorization.

18104752680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 18104752680 in words is "eighteen billion, one hundred four million, seven hundred fifty-two thousand, six hundred eighty".