18173718404 has 24 divisors (see below), whose sum is σ = 32290335168. Its totient is φ = 8948884320.

The previous prime is 18173718379. The next prime is 18173718413. The reversal of 18173718404 is 40481737181.

It is a super-3 number, since 3×18173718404³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47282 + ... + 196425.

It is an arithmetic number, because the mean of its divisors is an integer number (1345430632).

Almost surely, 2^18173718404 is an apocalyptic number.

It is an amenable number.

18173718404 is a deficient number, since it is larger than the sum of its proper divisors (14116616764).

18173718404 is a wasteful number, since it uses less digits than its factorization.

18173718404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243995 (or 243993 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 18173718404 in words is "eighteen billion, one hundred seventy-three million, seven hundred eighteen thousand, four hundred four".