18418672 has 10 divisors (see below), whose sum is σ = 35686208. Its totient is φ = 9209328.

The previous prime is 18418669. The next prime is 18418693. The reversal of 18418672 is 27681481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575568 + ... + 575599.

Almost surely, 2^18418672 is an apocalyptic number.

It is an amenable number.

18418672 is a deficient number, since it is larger than the sum of its proper divisors (17267536).

18418672 is a wasteful number, since it uses less digits than its factorization.

18418672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151175 (or 1151169 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 18418672 is about 4291.6980322478. The cubic root of 18418672 is about 264.0904954528.

The spelling of 18418672 in words is "eighteen million, four hundred eighteen thousand, six hundred seventy-two".