22536012 has 24 divisors (see below), whose sum is σ = 52856496. Its totient is φ = 7473088.

The previous prime is 22536011. The next prime is 22536037. The reversal of 22536012 is 21063522.

It is a self number, because there is not a number n which added to its sum of digits gives 22536012.

It is not an unprimeable number, because it can be changed into a prime (22536011) 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, 2403 + ... + 7130.

It is an arithmetic number, because the mean of its divisors is an integer number (2202354).

Almost surely, 2^22536012 is an apocalyptic number.

It is an amenable number.

22536012 is an abundant number, since it is smaller than the sum of its proper divisors (30320484).

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

22536012 is a wasteful number, since it uses less digits than its factorization.

22536012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9737 (or 9735 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22536012 is about 4747.2109706648. The cubic root of 22536012 is about 282.4613443336.

Adding to 22536012 its reverse (21063522), we get a palindrome (43599534).

The spelling of 22536012 in words is "twenty-two million, five hundred thirty-six thousand, twelve".