18815382 has 16 divisors (see below), whose sum is σ = 41812080. Its totient is φ = 6271776.

The previous prime is 18815359. The next prime is 18815387. The reversal of 18815382 is 28351881.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18815387) 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, 174163 + ... + 174270.

It is an arithmetic number, because the mean of its divisors is an integer number (2613255).

Almost surely, 2^18815382 is an apocalyptic number.

18815382 is an abundant number, since it is smaller than the sum of its proper divisors (22996698).

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

18815382 is a wasteful number, since it uses less digits than its factorization.

18815382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348444 (or 348438 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 18815382 is about 4337.6701119380. The cubic root of 18815382 is about 265.9730784746.

The spelling of 18815382 in words is "eighteen million, eight hundred fifteen thousand, three hundred eighty-two".