22242220644 has 24 divisors (see below), whose sum is σ = 59312588608. Its totient is φ = 6354920160.

The previous prime is 22242220621. The next prime is 22242220687. The reversal of 22242220644 is 44602224222.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132394087 + ... + 132394254.

Almost surely, 2^22242220644 is an apocalyptic number.

It is an amenable number.

22242220644 is an abundant number, since it is smaller than the sum of its proper divisors (37070367964).

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

22242220644 is a wasteful number, since it uses less digits than its factorization.

22242220644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264788355 (or 264788353 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 22242220644 its reverse (44602224222), we get a palindrome (66844444866).

The spelling of 22242220644 in words is "twenty-two billion, two hundred forty-two million, two hundred twenty thousand, six hundred forty-four".