18218334 has 16 divisors (see below), whose sum is σ = 36876672. Its totient is φ = 5999448.

The previous prime is 18218329. The next prime is 18218357. The reversal of 18218334 is 43381281.

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, 17794 + ... + 18789.

It is an arithmetic number, because the mean of its divisors is an integer number (2304792).

Almost surely, 2^18218334 is an apocalyptic number.

18218334 is an abundant number, since it is smaller than the sum of its proper divisors (18658338).

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

18218334 is a wasteful number, since it uses less digits than its factorization.

18218334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36671.

The product of its digits is 4608, while the sum is 30.

The square root of 18218334 is about 4268.2940386061. The cubic root of 18218334 is about 263.1295077492.

The spelling of 18218334 in words is "eighteen million, two hundred eighteen thousand, three hundred thirty-four".