18126318 has 64 divisors (see below), whose sum is σ = 44789760. Its totient is φ = 4772352.

The previous prime is 18126307. The next prime is 18126319. The reversal of 18126318 is 81362181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18126319) 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 31 ways as a sum of consecutive naturals, for example, 37603 + ... + 38081.

It is an arithmetic number, because the mean of its divisors is an integer number (699840).

Almost surely, 2^18126318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18126318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22394880).

18126318 is an abundant number, since it is smaller than the sum of its proper divisors (26663442).

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

18126318 is a wasteful number, since it uses less digits than its factorization.

18126318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561.

The product of its digits is 2304, while the sum is 30.

The square root of 18126318 is about 4257.5013799176. The cubic root of 18126318 is about 262.6857605773.

Adding to 18126318 its reverse (81362181), we get a palindrome (99488499).

The spelling of 18126318 in words is "eighteen million, one hundred twenty-six thousand, three hundred eighteen".