18113517475 has 24 divisors (see below), whose sum is σ = 23660360640. Its totient is φ = 13718005920.

The previous prime is 18113517473. The next prime is 18113517481. The reversal of 18113517475 is 57471531181.

It is not a de Polignac number, because 18113517475 - 2¹ = 18113517473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18113517473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 664464 + ... + 691186.

It is an arithmetic number, because the mean of its divisors is an integer number (985848360).

Almost surely, 2^18113517475 is an apocalyptic number.

18113517475 is a deficient number, since it is larger than the sum of its proper divisors (5546843165).

18113517475 is a wasteful number, since it uses less digits than its factorization.

18113517475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28179 (or 28174 counting only the distinct ones).

The product of its digits is 117600, while the sum is 43.

The spelling of 18113517475 in words is "eighteen billion, one hundred thirteen million, five hundred seventeen thousand, four hundred seventy-five".