18166445 has 32 divisors (see below), whose sum is σ = 24952320. Its totient is φ = 12579840.

The previous prime is 18166433. The next prime is 18166453. The reversal of 18166445 is 54466181.

It is not a de Polignac number, because 18166445 - 2⁴ = 18166429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160709 + ... + 160821.

It is an arithmetic number, because the mean of its divisors is an integer number (779760).

Almost surely, 2^18166445 is an apocalyptic number.

It is an amenable number.

18166445 is a deficient number, since it is larger than the sum of its proper divisors (6785875).

18166445 is a wasteful number, since it uses less digits than its factorization.

18166445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245.

The product of its digits is 23040, while the sum is 35.

The square root of 18166445 is about 4262.2112805444. The cubic root of 18166445 is about 262.8794572576.

The spelling of 18166445 in words is "eighteen million, one hundred sixty-six thousand, four hundred forty-five".