22005564 has 24 divisors (see below), whose sum is σ = 58681728. Its totient is φ = 6287280.

The previous prime is 22005559. The next prime is 22005569. The reversal of 22005564 is 46550022.

It is an interprime number because it is at equal distance from previous prime (22005559) and next prime (22005569).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22005569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130902 + ... + 131069.

It is an arithmetic number, because the mean of its divisors is an integer number (2445072).

Almost surely, 2^22005564 is an apocalyptic number.

It is an amenable number.

22005564 is an abundant number, since it is smaller than the sum of its proper divisors (36676164).

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

22005564 is a wasteful number, since it uses less digits than its factorization.

22005564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261985 (or 261983 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 22005564 is about 4691.0088467194. The cubic root of 22005564 is about 280.2275531151.

Adding to 22005564 its reverse (46550022), we get a palindrome (68555586).

The spelling of 22005564 in words is "twenty-two million, five thousand, five hundred sixty-four".