18473774593 has 32 divisors (see below), whose sum is σ = 19888727040. Its totient is φ = 17121170880.

The previous prime is 18473774581. The next prime is 18473774617. The reversal of 18473774593 is 39547737481.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18473774593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18473774533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29844238 + ... + 29844856.

It is an arithmetic number, because the mean of its divisors is an integer number (621522720).

Almost surely, 2^18473774593 is an apocalyptic number.

It is an amenable number.

18473774593 is a deficient number, since it is larger than the sum of its proper divisors (1414952447).

18473774593 is a wasteful number, since it uses less digits than its factorization.

18473774593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997.

The product of its digits is 17781120, while the sum is 58.

The spelling of 18473774593 in words is "eighteen billion, four hundred seventy-three million, seven hundred seventy-four thousand, five hundred ninety-three".