18380622 has 32 divisors (see below), whose sum is σ = 40158720. Its totient is φ = 5574240.

The previous prime is 18380617. The next prime is 18380629. The reversal of 18380622 is 22608381.

It is a self number, because there is not a number n which added to its sum of digits gives 18380622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380629) 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, 3879 + ... + 7197.

It is an arithmetic number, because the mean of its divisors is an integer number (1254960).

Almost surely, 2^18380622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18380622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20079360).

18380622 is an abundant number, since it is smaller than the sum of its proper divisors (21778098).

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

18380622 is a wasteful number, since it uses less digits than its factorization.

18380622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18380622 is about 4287.2627631159. The cubic root of 18380622 is about 263.9085139844.

The spelling of 18380622 in words is "eighteen million, three hundred eighty thousand, six hundred twenty-two".