18240166 has 8 divisors (see below), whose sum is σ = 31268880. Its totient is φ = 7817208.

The previous prime is 18240161. The next prime is 18240179. The reversal of 18240166 is 66104281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240161) 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 3 ways as a sum of consecutive naturals, for example, 651421 + ... + 651448.

It is an arithmetic number, because the mean of its divisors is an integer number (3908610).

Almost surely, 2^18240166 is an apocalyptic number.

18240166 is a deficient number, since it is larger than the sum of its proper divisors (13028714).

18240166 is a wasteful number, since it uses less digits than its factorization.

18240166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302878.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18240166 is about 4270.8507349239. The cubic root of 18240166 is about 263.2345731600.

The spelling of 18240166 in words is "eighteen million, two hundred forty thousand, one hundred sixty-six".