22189870 has 16 divisors (see below), whose sum is σ = 40039920. Its totient is φ = 8854144.

The previous prime is 22189861. The next prime is 22189877. The reversal of 22189870 is 7898122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22189877) 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 7 ways as a sum of consecutive naturals, for example, 1926 + ... + 6934.

It is an arithmetic number, because the mean of its divisors is an integer number (2502495).

Almost surely, 2^22189870 is an apocalyptic number.

22189870 is a deficient number, since it is larger than the sum of its proper divisors (17850050).

22189870 is a wasteful number, since it uses less digits than its factorization.

22189870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 22189870 is about 4710.6124867155. The cubic root of 22189870 is about 281.0077208991.

The spelling of 22189870 in words is "twenty-two million, one hundred eighty-nine thousand, eight hundred seventy".