22681636 has 12 divisors (see below), whose sum is σ = 40537728. Its totient is φ = 11099432.

The previous prime is 22681609. The next prime is 22681639. The reversal of 22681636 is 63618622.

It is a happy number.

It is a super-2 number, since 2×22681636² = 1028913223272992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22681639) 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, 60136 + ... + 60511.

It is an arithmetic number, because the mean of its divisors is an integer number (3378144).

Almost surely, 2^22681636 is an apocalyptic number.

It is an amenable number.

22681636 is a deficient number, since it is larger than the sum of its proper divisors (17856092).

22681636 is a wasteful number, since it uses less digits than its factorization.

22681636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120698 (or 120696 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 22681636 is about 4762.5241206738. The cubic root of 22681636 is about 283.0684447818.

The spelling of 22681636 in words is "twenty-two million, six hundred eighty-one thousand, six hundred thirty-six".