18973372475 has 6 divisors (see below), whose sum is σ = 23526981900. Its totient is φ = 15178697960.

The previous prime is 18973372399. The next prime is 18973372513. The reversal of 18973372475 is 57427337981.

It is a happy number.

It is not a de Polignac number, because 18973372475 - 2⁸ = 18973372219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18973372475.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 379467425 + ... + 379467474.

It is an arithmetic number, because the mean of its divisors is an integer number (3921163650).

Almost surely, 2^18973372475 is an apocalyptic number.

18973372475 is a deficient number, since it is larger than the sum of its proper divisors (4553609425).

18973372475 is an equidigital number, since it uses as much as digits as its factorization.

18973372475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758934909 (or 758934904 counting only the distinct ones).

The product of its digits is 8890560, while the sum is 56.

The spelling of 18973372475 in words is "eighteen billion, nine hundred seventy-three million, three hundred seventy-two thousand, four hundred seventy-five".