22120188 has 12 divisors (see below), whose sum is σ = 51613800. Its totient is φ = 7373392.

The previous prime is 22120187. The next prime is 22120193. The reversal of 22120188 is 88102122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120183) 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 3 ways as a sum of consecutive naturals, for example, 921663 + ... + 921686.

It is an arithmetic number, because the mean of its divisors is an integer number (4301150).

Almost surely, 2^22120188 is an apocalyptic number.

It is an amenable number.

22120188 is an abundant number, since it is smaller than the sum of its proper divisors (29493612).

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

22120188 is a wasteful number, since it uses less digits than its factorization.

22120188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843356 (or 1843354 counting only the distinct ones).

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

The square root of 22120188 is about 4703.2103929125. The cubic root of 22120188 is about 280.7132665300.

The spelling of 22120188 in words is "twenty-two million, one hundred twenty thousand, one hundred eighty-eight".