18214164 has 18 divisors (see below), whose sum is σ = 46041450. Its totient is φ = 6071376.

The previous prime is 18214111. The next prime is 18214171. The reversal of 18214164 is 46141281.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18147600 + 66564 = 4260^2 + 258^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 252939 + ... + 253010.

Almost surely, 2^18214164 is an apocalyptic number.

It is an amenable number.

18214164 is an abundant number, since it is smaller than the sum of its proper divisors (27827286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18214164 is a wasteful number, since it uses less digits than its factorization.

18214164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505959 (or 505954 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 18214164 is about 4267.8055250913. The cubic root of 18214164 is about 263.1094302863.

The spelling of 18214164 in words is "eighteen million, two hundred fourteen thousand, one hundred sixty-four".