22636685 has 4 divisors (see below), whose sum is σ = 27164028. Its totient is φ = 18109344.

The previous prime is 22636681. The next prime is 22636697. The reversal of 22636685 is 58663622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3020644 + 19616041 = 1738^2 + 4429^2 .

It is a cyclic number.

It is not a de Polignac number, because 22636685 - 2² = 22636681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22636681) 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, 2263664 + ... + 2263673.

It is an arithmetic number, because the mean of its divisors is an integer number (6791007).

Almost surely, 2^22636685 is an apocalyptic number.

It is an amenable number.

22636685 is a deficient number, since it is larger than the sum of its proper divisors (4527343).

22636685 is an equidigital number, since it uses as much as digits as its factorization.

22636685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4527342.

The product of its digits is 103680, while the sum is 38.

The square root of 22636685 is about 4757.8025389879. The cubic root of 22636685 is about 282.8813238786.

The spelling of 22636685 in words is "twenty-two million, six hundred thirty-six thousand, six hundred eighty-five".