22500012 has 24 divisors (see below), whose sum is σ = 52581312. Its totient is φ = 7488400.

The previous prime is 22500011. The next prime is 22500019. The reversal of 22500012 is 21000522.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22500011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10687 + ... + 12617.

It is an arithmetic number, because the mean of its divisors is an integer number (2190888).

Almost surely, 2^22500012 is an apocalyptic number.

It is an amenable number.

22500012 is an abundant number, since it is smaller than the sum of its proper divisors (30081300).

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

22500012 is a wasteful number, since it uses less digits than its factorization.

22500012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2909 (or 2907 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 22500012 is about 4743.4177551635. The cubic root of 22500012 is about 282.3108588529.

Adding to 22500012 its reverse (21000522), we get a palindrome (43500534).

The spelling of 22500012 in words is "twenty-two million, five hundred thousand, twelve".