18166764 has 48 divisors (see below), whose sum is σ = 52851456. Its totient is φ = 4718400.

The previous prime is 18166763. The next prime is 18166783. The reversal of 18166764 is 46766181.

It is a happy number.

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 not an unprimeable number, because it can be changed into a prime (18166763) 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, 8907 + ... + 10754.

It is an arithmetic number, because the mean of its divisors is an integer number (1101072).

Almost surely, 2^18166764 is an apocalyptic number.

18166764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18166764 is an abundant number, since it is smaller than the sum of its proper divisors (34684692).

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

18166764 is a wasteful number, since it uses less digits than its factorization.

18166764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19686 (or 19684 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 18166764 is about 4262.2487022697. The cubic root of 18166764 is about 262.8809959563.

The spelling of 18166764 in words is "eighteen million, one hundred sixty-six thousand, seven hundred sixty-four".