18337218 has 16 divisors (see below), whose sum is σ = 36720480. Its totient is φ = 6104736.

The previous prime is 18337201. The next prime is 18337219. The reversal of 18337218 is 81273381.

It is not an unprimeable number, because it can be changed into a prime (18337219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5421 + ... + 8127.

It is an arithmetic number, because the mean of its divisors is an integer number (2295030).

Almost surely, 2^18337218 is an apocalyptic number.

18337218 is an abundant number, since it is smaller than the sum of its proper divisors (18383262).

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

18337218 is a wasteful number, since it uses less digits than its factorization.

18337218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841.

The product of its digits is 8064, while the sum is 33.

The square root of 18337218 is about 4282.1978001956. The cubic root of 18337218 is about 263.7006190729.

It can be divided in two parts, 183 and 37218, that added together give a triangular number (37401 = T₂₇₃).

The spelling of 18337218 in words is "eighteen million, three hundred thirty-seven thousand, two hundred eighteen".