18838164 has 48 divisors (see below), whose sum is σ = 45416448. Its totient is φ = 6074208.

The previous prime is 18838163. The next prime is 18838181. The reversal of 18838164 is 46183881.

It is a Smith number, since the sum of its digits (39) 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 (18838163) 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 15 ways as a sum of consecutive naturals, for example, 71497 + ... + 71759.

It is an arithmetic number, because the mean of its divisors is an integer number (946176).

Almost surely, 2^18838164 is an apocalyptic number.

It is an amenable number.

18838164 is an abundant number, since it is smaller than the sum of its proper divisors (26578284).

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

18838164 is a wasteful number, since it uses less digits than its factorization.

18838164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 442 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 18838164 is about 4340.2953816532. The cubic root of 18838164 is about 266.0803834926.

The spelling of 18838164 in words is "eighteen million, eight hundred thirty-eight thousand, one hundred sixty-four".