18173804038 has 48 divisors (see below), whose sum is σ = 31111566480. Its totient is φ = 7936486272.

The previous prime is 18173804029. The next prime is 18173804053. The reversal of 18173804038 is 83040837181.

It is a junction number, because it is equal to n+sod(n) for n = 18173803985 and 18173804003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7788720 + ... + 7791052.

It is an arithmetic number, because the mean of its divisors is an integer number (648157635).

Almost surely, 2^18173804038 is an apocalyptic number.

18173804038 is a deficient number, since it is larger than the sum of its proper divisors (12937762442).

18173804038 is a wasteful number, since it uses less digits than its factorization.

18173804038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593 (or 3580 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 18173804038 in words is "eighteen billion, one hundred seventy-three million, eight hundred four thousand, thirty-eight".