18082818 has 32 divisors (see below), whose sum is σ = 43276800. Its totient is φ = 5563728.

The previous prime is 18082811. The next prime is 18082819. The reversal of 18082818 is 81828081.

It is a happy number.

It is a super-2 number, since 2×18082818² = 653976613642248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18082811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12178 + ... + 13581.

It is an arithmetic number, because the mean of its divisors is an integer number (1352400).

Almost surely, 2^18082818 is an apocalyptic number.

18082818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18082818 is an abundant number, since it is smaller than the sum of its proper divisors (25193982).

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

18082818 is a wasteful number, since it uses less digits than its factorization.

18082818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25783 (or 25777 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 36.

The square root of 18082818 is about 4252.3896811087. The cubic root of 18082818 is about 262.4754589302.

The spelling of 18082818 in words is "eighteen million, eighty-two thousand, eight hundred eighteen".