22631636 has 12 divisors (see below), whose sum is σ = 40353012. Its totient is φ = 11102208.

The previous prime is 22631617. The next prime is 22631639. The reversal of 22631636 is 63613622.

It can be written as a sum of positive squares in 2 ways, for example, as 15840400 + 6791236 = 3980^2 + 2606^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22631599 and 22631608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22631639) 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, 53165 + ... + 53588.

It is an arithmetic number, because the mean of its divisors is an integer number (3362751).

Almost surely, 2^22631636 is an apocalyptic number.

It is an amenable number.

22631636 is a deficient number, since it is larger than the sum of its proper divisors (17721376).

22631636 is a wasteful number, since it uses less digits than its factorization.

22631636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106810 (or 106808 counting only the distinct ones).

The product of its digits is 7776, while the sum is 29.

The square root of 22631636 is about 4757.2719073015. The cubic root of 22631636 is about 282.8602905573.

The spelling of 22631636 in words is "twenty-two million, six hundred thirty-one thousand, six hundred thirty-six".