22131004044 has 12 divisors (see below), whose sum is σ = 51639009464. Its totient is φ = 7377001344.

The previous prime is 22131004043. The next prime is 22131004099. The reversal of 22131004044 is 44040013122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 22131004044.

It is not an unprimeable number, because it can be changed into a prime (22131004043) 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, 922125157 + ... + 922125180.

Almost surely, 2^22131004044 is an apocalyptic number.

It is an amenable number.

22131004044 is an abundant number, since it is smaller than the sum of its proper divisors (29508005420).

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

22131004044 is a wasteful number, since it uses less digits than its factorization.

22131004044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844250344 (or 1844250342 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 22131004044 its reverse (44040013122), we get a palindrome (66171017166).

The spelling of 22131004044 in words is "twenty-two billion, one hundred thirty-one million, four thousand, forty-four".