18542244 has 48 divisors (see below), whose sum is σ = 49932288. Its totient is φ = 5245728.

The previous prime is 18542201. The next prime is 18542261. The reversal of 18542244 is 44224581.

It is an unprimeable number.

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, 7957 + ... + 10019.

It is an arithmetic number, because the mean of its divisors is an integer number (1040256).

Almost surely, 2^18542244 is an apocalyptic number.

18542244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18542244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24966144).

18542244 is an abundant number, since it is smaller than the sum of its proper divisors (31390044).

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

18542244 is a wasteful number, since it uses less digits than its factorization.

18542244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184 (or 2182 counting only the distinct ones).

The product of its digits is 10240, while the sum is 30.

The square root of 18542244 is about 4306.0705985852. The cubic root of 18542244 is about 264.6797793403.

The spelling of 18542244 in words is "eighteen million, five hundred forty-two thousand, two hundred forty-four".