18900812 has 12 divisors (see below), whose sum is σ = 37801680. Its totient is φ = 8100336.

The previous prime is 18900797. The next prime is 18900823. The reversal of 18900812 is 21800981.

18900812 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337487 + ... + 337542.

It is an arithmetic number, because the mean of its divisors is an integer number (3150140).

Almost surely, 2^18900812 is an apocalyptic number.

It is an amenable number.

18900812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18900812 is a wasteful number, since it uses less digits than its factorization.

18900812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675040 (or 675038 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 18900812 is about 4347.5064117262. The cubic root of 18900812 is about 266.3750151668.

The spelling of 18900812 in words is "eighteen million, nine hundred thousand, eight hundred twelve".