18173404972 has 12 divisors (see below), whose sum is σ = 31814184136. Its totient is φ = 9083638080.

The previous prime is 18173404927. The next prime is 18173404993. The reversal of 18173404972 is 27940437181.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752733 + ... + 776500.

Almost surely, 2^18173404972 is an apocalyptic number.

It is an amenable number.

18173404972 is a deficient number, since it is larger than the sum of its proper divisors (13640779164).

18173404972 is a wasteful number, since it uses less digits than its factorization.

18173404972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532208 (or 1532206 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 18173404972 in words is "eighteen billion, one hundred seventy-three million, four hundred four thousand, nine hundred seventy-two".