22123636 has 24 divisors (see below), whose sum is σ = 40257000. Its totient is φ = 10625664.

The previous prime is 22123609. The next prime is 22123639. The reversal of 22123636 is 63632122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 90000 + 22033636 = 300^2 + 4694^2 .

22123636 is a modest number, since divided by 3636 gives 2212 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 22123636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22123639) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 30850 + ... + 31558.

It is an arithmetic number, because the mean of its divisors is an integer number (1677375).

Almost surely, 2^22123636 is an apocalyptic number.

It is an amenable number.

22123636 is a deficient number, since it is larger than the sum of its proper divisors (18133364).

22123636 is a wasteful number, since it uses less digits than its factorization.

22123636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 1009 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

The square root of 22123636 is about 4703.5769367578. The cubic root of 22123636 is about 280.7278512321.

Adding to 22123636 its reverse (63632122), we get a palindrome (85755758).

The spelling of 22123636 in words is "twenty-two million, one hundred twenty-three thousand, six hundred thirty-six".