18413788 has 12 divisors (see below), whose sum is σ = 34119792. Its totient is φ = 8665280.

The previous prime is 18413767. The next prime is 18413789. The reversal of 18413788 is 88731481.

It is a self number, because there is not a number n which added to its sum of digits gives 18413788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18413789) 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 3 ways as a sum of consecutive naturals, for example, 135328 + ... + 135463.

It is an arithmetic number, because the mean of its divisors is an integer number (2843316).

Almost surely, 2^18413788 is an apocalyptic number.

It is an amenable number.

18413788 is a deficient number, since it is larger than the sum of its proper divisors (15706004).

18413788 is a wasteful number, since it uses less digits than its factorization.

18413788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270812 (or 270810 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 18413788 is about 4291.1289889725. The cubic root of 18413788 is about 264.0671508092.

The spelling of 18413788 in words is "eighteen million, four hundred thirteen thousand, seven hundred eighty-eight".