18164164 has 6 divisors (see below), whose sum is σ = 31787294. Its totient is φ = 9082080.

The previous prime is 18164161. The next prime is 18164173. The reversal of 18164164 is 46146181.

It can be written as a sum of positive squares in only one way, i.e., 14002564 + 4161600 = 3742^2 + 2040^2 .

It is not an unprimeable number, because it can be changed into a prime (18164161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2270517 + ... + 2270524.

Almost surely, 2^18164164 is an apocalyptic number.

It is an amenable number.

18164164 is a deficient number, since it is larger than the sum of its proper divisors (13623130).

18164164 is a wasteful number, since it uses less digits than its factorization.

18164164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4541045 (or 4541043 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 18164164 is about 4261.9436880372. The cubic root of 18164164 is about 262.8684543134.

The spelling of 18164164 in words is "eighteen million, one hundred sixty-four thousand, one hundred sixty-four".