18466518 has 64 divisors (see below), whose sum is σ = 45181440. Its totient is φ = 4914432.

The previous prime is 18466507. The next prime is 18466519. The reversal of 18466518 is 81566481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18466519) 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, 58096 + ... + 58412.

It is an arithmetic number, because the mean of its divisors is an integer number (705960).

Almost surely, 2^18466518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18466518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22590720).

18466518 is an abundant number, since it is smaller than the sum of its proper divisors (26714922).

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

18466518 is a wasteful number, since it uses less digits than its factorization.

18466518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421.

The product of its digits is 46080, while the sum is 39.

The square root of 18466518 is about 4297.2686674212. The cubic root of 18466518 is about 264.3189728085.

The spelling of 18466518 in words is "eighteen million, four hundred sixty-six thousand, five hundred eighteen".