22644252012 has 24 divisors (see below), whose sum is σ = 53960772096. Its totient is φ = 7387486288.

The previous prime is 22644252011. The next prime is 22644252047. The reversal of 22644252012 is 21025244622.

It is a super-3 number, since 3×22644252012³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22644252011) 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, 20074128 + ... + 20075255.

It is an arithmetic number, because the mean of its divisors is an integer number (2248365504).

Almost surely, 2^22644252012 is an apocalyptic number.

It is an amenable number.

22644252012 is an abundant number, since it is smaller than the sum of its proper divisors (31316520084).

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

22644252012 is a wasteful number, since it uses less digits than its factorization.

22644252012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40149437 (or 40149435 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 22644252012 its reverse (21025244622), we get a palindrome (43669496634).

The spelling of 22644252012 in words is "twenty-two billion, six hundred forty-four million, two hundred fifty-two thousand, twelve".