22023644 has 12 divisors (see below), whose sum is σ = 39870600. Its totient is φ = 10632048.

The previous prime is 22023629. The next prime is 22023691. The reversal of 22023644 is 44632022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94814 + ... + 95045.

It is an arithmetic number, because the mean of its divisors is an integer number (3322550).

Almost surely, 2^22023644 is an apocalyptic number.

It is an amenable number.

22023644 is a deficient number, since it is larger than the sum of its proper divisors (17846956).

22023644 is a wasteful number, since it uses less digits than its factorization.

22023644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189892 (or 189890 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 22023644 is about 4692.9355418544. The cubic root of 22023644 is about 280.3042780625.

Adding to 22023644 its reverse (44632022), we get a palindrome (66655666).

The spelling of 22023644 in words is "twenty-two million, twenty-three thousand, six hundred forty-four".