18435346878 has 32 divisors (see below), whose sum is σ = 39712127616. Its totient is φ = 5671667808.

The previous prime is 18435346841. The next prime is 18435346939. The reversal of 18435346878 is 87864353481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1019625 + ... + 1037547.

It is an arithmetic number, because the mean of its divisors is an integer number (1241003988).

Almost surely, 2^18435346878 is an apocalyptic number.

18435346878 is an abundant number, since it is smaller than the sum of its proper divisors (21276780738).

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

18435346878 is a wasteful number, since it uses less digits than its factorization.

18435346878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31128.

The product of its digits is 15482880, while the sum is 57.

The spelling of 18435346878 in words is "eighteen billion, four hundred thirty-five million, three hundred forty-six thousand, eight hundred seventy-eight".