18224844 has 48 divisors (see below), whose sum is σ = 46884096. Its totient is φ = 5464000.

The previous prime is 18224837. The next prime is 18224849. The reversal of 18224844 is 44842281.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (18224849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12649 + ... + 14015.

It is an arithmetic number, because the mean of its divisors is an integer number (976752).

Almost surely, 2^18224844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18224844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23442048).

18224844 is an abundant number, since it is smaller than the sum of its proper divisors (28659252).

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

18224844 is a wasteful number, since it uses less digits than its factorization.

18224844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486 (or 1484 counting only the distinct ones).

The product of its digits is 16384, while the sum is 33.

The square root of 18224844 is about 4269.0565702506. The cubic root of 18224844 is about 263.1608455781.

It can be divided in two parts, 1822 and 4844, that added together give a palindrome (6666).

The spelling of 18224844 in words is "eighteen million, two hundred twenty-four thousand, eight hundred forty-four".