18904412 has 12 divisors (see below), whose sum is σ = 33481896. Its totient is φ = 9338160.

The previous prime is 18904409. The next prime is 18904421. The reversal of 18904412 is 21440981.

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 in 3 ways as a sum of consecutive naturals, for example, 28139 + ... + 28802.

It is an arithmetic number, because the mean of its divisors is an integer number (2790158).

Almost surely, 2^18904412 is an apocalyptic number.

It is an amenable number.

18904412 is a deficient number, since it is larger than the sum of its proper divisors (14577484).

18904412 is a wasteful number, since it uses less digits than its factorization.

18904412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57028 (or 57026 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 18904412 is about 4347.9204224549. The cubic root of 18904412 is about 266.3919260660.

The spelling of 18904412 in words is "eighteen million, nine hundred four thousand, four hundred twelve".