18246222 has 80 divisors (see below), whose sum is σ = 43908480. Its totient is φ = 5650128.

The previous prime is 18246211. The next prime is 18246227. The reversal of 18246222 is 22264281.

It is a happy number.

18246222 is a `hidden beast` number, since 18 + 24 + 622 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18246227) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 219793 + ... + 219875.

It is an arithmetic number, because the mean of its divisors is an integer number (548856).

Almost surely, 2^18246222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18246222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21954240).

18246222 is an abundant number, since it is smaller than the sum of its proper divisors (25662258).

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

18246222 is a wasteful number, since it uses less digits than its factorization.

18246222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 170 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 18246222 is about 4271.5596683179. The cubic root of 18246222 is about 263.2637025034.

The spelling of 18246222 in words is "eighteen million, two hundred forty-six thousand, two hundred twenty-two".