22012188 has 48 divisors (see below), whose sum is σ = 57558144. Its totient is φ = 6488640.

The previous prime is 22012187. The next prime is 22012231. The reversal of 22012188 is 88121022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012183) 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, 2631 + ... + 7137.

It is an arithmetic number, because the mean of its divisors is an integer number (1199128).

Almost surely, 2^22012188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22012188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28779072).

22012188 is an abundant number, since it is smaller than the sum of its proper divisors (35545956).

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

22012188 is a wasteful number, since it uses less digits than its factorization.

22012188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4562 (or 4560 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 22012188 is about 4691.7148250933. The cubic root of 22012188 is about 280.2556678393.

The spelling of 22012188 in words is "twenty-two million, twelve thousand, one hundred eighty-eight".