18388214 has 12 divisors (see below), whose sum is σ = 29867796. Its totient is φ = 8486712.

The previous prime is 18388207. The next prime is 18388229. The reversal of 18388214 is 41288381.

It is a Curzon number.

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, 26864 + ... + 27539.

It is an arithmetic number, because the mean of its divisors is an integer number (2488983).

Almost surely, 2^18388214 is an apocalyptic number.

18388214 is a deficient number, since it is larger than the sum of its proper divisors (11479582).

18388214 is a wasteful number, since it uses less digits than its factorization.

18388214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54431 (or 54418 counting only the distinct ones).

The product of its digits is 12288, while the sum is 35.

The square root of 18388214 is about 4288.1480851295. The cubic root of 18388214 is about 263.9448442320.

The spelling of 18388214 in words is "eighteen million, three hundred eighty-eight thousand, two hundred fourteen".