22056636 has 48 divisors (see below), whose sum is σ = 59446016. Its totient is φ = 6234624.

The previous prime is 22056623. The next prime is 22056637. The reversal of 22056636 is 63665022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22056637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6795 + ... + 9501.

Almost surely, 2^22056636 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 22056636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29723008).

22056636 is an abundant number, since it is smaller than the sum of its proper divisors (37389380).

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

22056636 is a wasteful number, since it uses less digits than its factorization.

22056636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818 (or 2816 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 22056636 is about 4696.4492970754. The cubic root of 22056636 is about 280.4441759645. Note that the first 3 decimals are identical.

The spelling of 22056636 in words is "twenty-two million, fifty-six thousand, six hundred thirty-six".