22131354644 has 24 divisors (see below), whose sum is σ = 44328516288. Its totient is φ = 9470764800.

The previous prime is 22131354631. The next prime is 22131354649. The reversal of 22131354644 is 44645313122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131354649) 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, 568382 + ... + 606069.

It is an arithmetic number, because the mean of its divisors is an integer number (1847021512).

Almost surely, 2^22131354644 is an apocalyptic number.

It is an amenable number.

22131354644 is an abundant number, since it is smaller than the sum of its proper divisors (22197161644).

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

22131354644 is a wasteful number, since it uses less digits than its factorization.

22131354644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175135 (or 1175133 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

Adding to 22131354644 its reverse (44645313122), we get a palindrome (66776667766).

The spelling of 22131354644 in words is "twenty-two billion, one hundred thirty-one million, three hundred fifty-four thousand, six hundred forty-four".