18384222 has 32 divisors (see below), whose sum is σ = 38776320. Its totient is φ = 5799200.

The previous prime is 18384221. The next prime is 18384239. The reversal of 18384222 is 22248381.

It is a self number, because there is not a number n which added to its sum of digits gives 18384222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18384221) 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, 13279 + ... + 14597.

It is an arithmetic number, because the mean of its divisors is an integer number (1211760).

Almost surely, 2^18384222 is an apocalyptic number.

18384222 is an abundant number, since it is smaller than the sum of its proper divisors (20392098).

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

18384222 is a wasteful number, since it uses less digits than its factorization.

18384222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448.

The product of its digits is 6144, while the sum is 30.

The square root of 18384222 is about 4287.6825908642. The cubic root of 18384222 is about 263.9257424299.

The spelling of 18384222 in words is "eighteen million, three hundred eighty-four thousand, two hundred twenty-two".