22563644 has 12 divisors (see below), whose sum is σ = 41203344. Its totient is φ = 10791264.

The previous prime is 22563631. The next prime is 22563649. The reversal of 22563644 is 44636522.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 22563644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22563649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122537 + ... + 122720.

It is an arithmetic number, because the mean of its divisors is an integer number (3433612).

Almost surely, 2^22563644 is an apocalyptic number.

It is an amenable number.

22563644 is a deficient number, since it is larger than the sum of its proper divisors (18639700).

22563644 is a wasteful number, since it uses less digits than its factorization.

22563644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245284 (or 245282 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

The square root of 22563644 is about 4750.1204195262. The cubic root of 22563644 is about 282.5767416227.

The spelling of 22563644 in words is "twenty-two million, five hundred sixty-three thousand, six hundred forty-four".