22290018 has 16 divisors (see below), whose sum is σ = 45040800. Its totient is φ = 7353216.

The previous prime is 22290011. The next prime is 22290031. The reversal of 22290018 is 81009222.

It is a self number, because there is not a number n which added to its sum of digits gives 22290018.

It is not an unprimeable number, because it can be changed into a prime (22290011) 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 7 ways as a sum of consecutive naturals, for example, 18568 + ... + 19731.

It is an arithmetic number, because the mean of its divisors is an integer number (2815050).

Almost surely, 2^22290018 is an apocalyptic number.

22290018 is an abundant number, since it is smaller than the sum of its proper divisors (22750782).

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

22290018 is a wasteful number, since it uses less digits than its factorization.

22290018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38401.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 22290018 is about 4721.2305599282. The cubic root of 22290018 is about 281.4298373786.

The spelling of 22290018 in words is "twenty-two million, two hundred ninety thousand, eighteen".