18475134426 has 128 divisors (see below), whose sum is σ = 47908247040. Its totient is φ = 5167977984.

The previous prime is 18475134413. The next prime is 18475134541. The reversal of 18475134426 is 62443157481.

18475134426 is a `hidden beast` number, since 1 + 8 + 475 + 134 + 42 + 6 = 666.

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 63 ways as a sum of consecutive naturals, for example, 15485686 + ... + 15486878.

It is an arithmetic number, because the mean of its divisors is an integer number (374283180).

Almost surely, 2^18475134426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18475134426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23954123520).

18475134426 is an abundant number, since it is smaller than the sum of its proper divisors (29433112614).

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

18475134426 is a wasteful number, since it uses less digits than its factorization.

18475134426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037 (or 2031 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The spelling of 18475134426 in words is "eighteen billion, four hundred seventy-five million, one hundred thirty-four thousand, four hundred twenty-six".