18810812 has 12 divisors (see below), whose sum is σ = 33045936. Its totient is φ = 9369120.

The previous prime is 18810797. The next prime is 18810829. The reversal of 18810812 is 21801881.

It is a congruent 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, 7889 + ... + 9992.

It is an arithmetic number, because the mean of its divisors is an integer number (2753828).

Almost surely, 2^18810812 is an apocalyptic number.

It is an amenable number.

18810812 is a deficient number, since it is larger than the sum of its proper divisors (14235124).

18810812 is a wasteful number, since it uses less digits than its factorization.

18810812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18148 (or 18146 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 18810812 is about 4337.1432994541. The cubic root of 18810812 is about 265.9515429850.

The spelling of 18810812 in words is "eighteen million, eight hundred ten thousand, eight hundred twelve".