18908672 has 20 divisors (see below), whose sum is σ = 37781436. Its totient is φ = 9454080.

The previous prime is 18908663. The next prime is 18908693. The reversal of 18908672 is 27680981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17954 + ... + 18977.

Almost surely, 2^18908672 is an apocalyptic number.

It is an amenable number.

18908672 is a deficient number, since it is larger than the sum of its proper divisors (18872764).

18908672 is an frugal number, since it uses more digits than its factorization.

18908672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36949 (or 36933 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 18908672 is about 4348.4102842303. The cubic root of 18908672 is about 266.4119345235.

The spelling of 18908672 in words is "eighteen million, nine hundred eight thousand, six hundred seventy-two".