18164212 has 24 divisors (see below), whose sum is σ = 35269920. Its totient is φ = 8115360.

The previous prime is 18164173. The next prime is 18164221. The reversal of 18164212 is 21246181.

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, 903 + ... + 6094.

It is an arithmetic number, because the mean of its divisors is an integer number (1469580).

Almost surely, 2^18164212 is an apocalyptic number.

It is an amenable number.

18164212 is a deficient number, since it is larger than the sum of its proper divisors (17105708).

18164212 is a wasteful number, since it uses less digits than its factorization.

18164212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7071 (or 7069 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 18164212 is about 4261.9493192669. The cubic root of 18164212 is about 262.8686858623.

The spelling of 18164212 in words is "eighteen million, one hundred sixty-four thousand, two hundred twelve".