18174364993 has 16 divisors (see below), whose sum is σ = 18942136576. Its totient is φ = 17424182160.

The previous prime is 18174364951. The next prime is 18174364997. The reversal of 18174364993 is 39946347181.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18174364993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18174364997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804178 + ... + 826468.

It is an arithmetic number, because the mean of its divisors is an integer number (1183883536).

Almost surely, 2^18174364993 is an apocalyptic number.

It is an amenable number.

18174364993 is a deficient number, since it is larger than the sum of its proper divisors (767771583).

18174364993 is a wasteful number, since it uses less digits than its factorization.

18174364993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22684.

The product of its digits is 3919104, while the sum is 55.

The spelling of 18174364993 in words is "eighteen billion, one hundred seventy-four million, three hundred sixty-four thousand, nine hundred ninety-three".