18818136 has 32 divisors (see below), whose sum is σ = 52273200. Its totient is φ = 6272640.

The previous prime is 18818131. The next prime is 18818207. The reversal of 18818136 is 63181881.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 18818136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18818131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43345 + ... + 43776.

Almost surely, 2^18818136 is an apocalyptic number.

It is an amenable number.

18818136 is an abundant number, since it is smaller than the sum of its proper divisors (33455064).

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

18818136 is a wasteful number, since it uses less digits than its factorization.

18818136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87136 (or 87126 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 18818136 is about 4337.9875518494. The cubic root of 18818136 is about 265.9860546329.

The spelling of 18818136 in words is "eighteen million, eight hundred eighteen thousand, one hundred thirty-six".