18055535904 has 96 divisors (see below), whose sum is σ = 60185139840. Its totient is φ = 5158722816.

The previous prime is 18055535903. The next prime is 18055535951. The reversal of 18055535904 is 40953555081.

18055535904 is a `hidden beast` number, since 1 + 8 + 0 + 5 + 5 + 53 + 590 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 18055535904.

It is not an unprimeable number, because it can be changed into a prime (18055535903) 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, 1486639 + ... + 1498734.

It is an arithmetic number, because the mean of its divisors is an integer number (626928540).

Almost surely, 2^18055535904 is an apocalyptic number.

18055535904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18055535904 is an abundant number, since it is smaller than the sum of its proper divisors (42129603936).

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

18055535904 is a wasteful number, since it uses less digits than its factorization.

18055535904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2985399 (or 2985385 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 45.

The spelling of 18055535904 in words is "eighteen billion, fifty-five million, five hundred thirty-five thousand, nine hundred four".