18902812 has 12 divisors (see below), whose sum is σ = 33113080. Its totient is φ = 9441936.

The previous prime is 18902801. The next prime is 18902837. The reversal of 18902812 is 21820981.

It is a happy number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 4063 + ... + 7369.

Almost surely, 2^18902812 is an apocalyptic number.

It is an amenable number.

18902812 is a deficient number, since it is larger than the sum of its proper divisors (14210268).

18902812 is a wasteful number, since it uses less digits than its factorization.

18902812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4740 (or 4738 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18902812 is about 4347.7364225537. The cubic root of 18902812 is about 266.3844103759.

The spelling of 18902812 in words is "eighteen million, nine hundred two thousand, eight hundred twelve".