18806916 has 24 divisors (see below), whose sum is σ = 45791424. Its totient is φ = 5996320.

The previous prime is 18806897. The next prime is 18806923. The reversal of 18806916 is 61960881.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33795 + ... + 34346.

It is an arithmetic number, because the mean of its divisors is an integer number (1907976).

Almost surely, 2^18806916 is an apocalyptic number.

It is an amenable number.

18806916 is an abundant number, since it is smaller than the sum of its proper divisors (26984508).

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

18806916 is a wasteful number, since it uses less digits than its factorization.

18806916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68171 (or 68169 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 18806916 is about 4336.6941326314. The cubic root of 18806916 is about 265.9331808723.

The spelling of 18806916 in words is "eighteen million, eight hundred six thousand, nine hundred sixteen".