18818884 has 12 divisors (see below), whose sum is σ = 37637824. Its totient is φ = 8065224.

The previous prime is 18818867. The next prime is 18818909. The reversal of 18818884 is 48881881.

It is a happy number.

18818884 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336024 + ... + 336079.

Almost surely, 2^18818884 is an apocalyptic number.

18818884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18818884 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18818884 is a wasteful number, since it uses less digits than its factorization.

18818884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672114 (or 672112 counting only the distinct ones).

The product of its digits is 131072, while the sum is 46.

The square root of 18818884 is about 4338.0737660856. The cubic root of 18818884 is about 265.9895788029.

The spelling of 18818884 in words is "eighteen million, eight hundred eighteen thousand, eight hundred eighty-four".