22636012 has 24 divisors (see below), whose sum is σ = 45543456. Its totient is φ = 9643008.

The previous prime is 22635997. The next prime is 22636013. The reversal of 22636012 is 21063622.

It is a happy number.

It is a super-3 number, since 3×22636012³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22636013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2508 + ... + 7180.

It is an arithmetic number, because the mean of its divisors is an integer number (1897644).

Almost surely, 2^22636012 is an apocalyptic number.

It is an amenable number.

22636012 is an abundant number, since it is smaller than the sum of its proper divisors (22907444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22636012 is a wasteful number, since it uses less digits than its factorization.

22636012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4857 (or 4855 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 22636012 is about 4757.7318125342. The cubic root of 22636012 is about 282.8785204496.

Adding to 22636012 its reverse (21063622), we get a palindrome (43699634).

The spelling of 22636012 in words is "twenty-two million, six hundred thirty-six thousand, twelve".