18164236 has 12 divisors (see below), whose sum is σ = 32262328. Its totient is φ = 8946432.

The previous prime is 18164221. The next prime is 18164249. The reversal of 18164236 is 63246181.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18164198 and 18164207.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33621 + ... + 34156.

Almost surely, 2^18164236 is an apocalyptic number.

It is an amenable number.

18164236 is a deficient number, since it is larger than the sum of its proper divisors (14098092).

18164236 is a wasteful number, since it uses less digits than its factorization.

18164236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67848 (or 67846 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 18164236 is about 4261.9521348790. The cubic root of 18164236 is about 262.8688016365.

The spelling of 18164236 in words is "eighteen million, one hundred sixty-four thousand, two hundred thirty-six".