18942808 has 16 divisors (see below), whose sum is σ = 35725680. Its totient is φ = 9415968.

The previous prime is 18942769. The next prime is 18942809. The reversal of 18942808 is 80824981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18942809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5460 + ... + 8227.

It is an arithmetic number, because the mean of its divisors is an integer number (2232855).

Almost surely, 2^18942808 is an apocalyptic number.

It is an amenable number.

18942808 is a deficient number, since it is larger than the sum of its proper divisors (16782872).

18942808 is a wasteful number, since it uses less digits than its factorization.

18942808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13866 (or 13862 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 18942808 is about 4352.3336269179. Note that the first 3 decimals coincide. The cubic root of 18942808 is about 266.5721567863.

The spelling of 18942808 in words is "eighteen million, nine hundred forty-two thousand, eight hundred eight".