22236018 has 32 divisors (see below), whose sum is σ = 50993280. Its totient is φ = 6332160.

The previous prime is 22236013. The next prime is 22236037. The reversal of 22236018 is 81063222.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22236013) 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, 15658 + ... + 17018.

It is an arithmetic number, because the mean of its divisors is an integer number (1593540).

Almost surely, 2^22236018 is an apocalyptic number.

22236018 is an abundant number, since it is smaller than the sum of its proper divisors (28757262).

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

22236018 is a wasteful number, since it uses less digits than its factorization.

22236018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 22236018 is about 4715.5082440814. The cubic root of 22236018 is about 281.2023887801.

The spelling of 22236018 in words is "twenty-two million, two hundred thirty-six thousand, eighteen".