18167404408 has 16 divisors (see below), whose sum is σ = 34171345080. Its totient is φ = 9055045728.

The previous prime is 18167404403. The next prime is 18167404417. The reversal of 18167404408 is 80440476181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18167404403) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3579366 + ... + 3584437.

Almost surely, 2^18167404408 is an apocalyptic number.

It is an amenable number.

18167404408 is a deficient number, since it is larger than the sum of its proper divisors (16003940672).

18167404408 is a wasteful number, since it uses less digits than its factorization.

18167404408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7164126 (or 7164122 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 18167404408 in words is "eighteen billion, one hundred sixty-seven million, four hundred four thousand, four hundred eight".