18799816 has 32 divisors (see below), whose sum is σ = 42408000. Its totient is φ = 7632576.

The previous prime is 18799813. The next prime is 18799817. The reversal of 18799816 is 61899781.

It is a self number, because there is not a number n which added to its sum of digits gives 18799816.

It is not an unprimeable number, because it can be changed into a prime (18799813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7771 + ... + 9898.

It is an arithmetic number, because the mean of its divisors is an integer number (1325250).

Almost surely, 2^18799816 is an apocalyptic number.

It is an amenable number.

18799816 is an abundant number, since it is smaller than the sum of its proper divisors (23608184).

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

18799816 is a wasteful number, since it uses less digits than its factorization.

18799816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17701 (or 17697 counting only the distinct ones).

The product of its digits is 217728, while the sum is 49.

The square root of 18799816 is about 4335.8754594661. The cubic root of 18799816 is about 265.8997115670.

The spelling of 18799816 in words is "eighteen million, seven hundred ninety-nine thousand, eight hundred sixteen".