18216354 has 32 divisors (see below), whose sum is σ = 40078080. Its totient is φ = 5484672.

The previous prime is 18216353. The next prime is 18216361. The reversal of 18216354 is 45361281.

It is not an unprimeable number, because it can be changed into a prime (18216353) 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 15 ways as a sum of consecutive naturals, for example, 1182 + ... + 6150.

It is an arithmetic number, because the mean of its divisors is an integer number (1252440).

Almost surely, 2^18216354 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18216354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20039040).

18216354 is an abundant number, since it is smaller than the sum of its proper divisors (21861726).

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

18216354 is a wasteful number, since it uses less digits than its factorization.

18216354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5034.

The product of its digits is 5760, while the sum is 30.

The square root of 18216354 is about 4268.0620895203. The cubic root of 18216354 is about 263.1199749474.

The spelling of 18216354 in words is "eighteen million, two hundred sixteen thousand, three hundred fifty-four".