18166368 has 48 divisors (see below), whose sum is σ = 52024896. Its totient is φ = 5504640.

The previous prime is 18166307. The next prime is 18166373. The reversal of 18166368 is 86366181.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×18166368² = 660033852622848, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7546 + ... + 9657.

It is an arithmetic number, because the mean of its divisors is an integer number (1083852).

Almost surely, 2^18166368 is an apocalyptic number.

It is an amenable number.

18166368 is an abundant number, since it is smaller than the sum of its proper divisors (33858528).

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

18166368 is a wasteful number, since it uses less digits than its factorization.

18166368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17227 (or 17219 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 18166368 is about 4262.2022476649. The cubic root of 18166368 is about 262.8790858448.

The spelling of 18166368 in words is "eighteen million, one hundred sixty-six thousand, three hundred sixty-eight".