22559404021 has 16 divisors (see below), whose sum is σ = 28340725248. Its totient is φ = 17444559600.

The previous prime is 22559404009. The next prime is 22559404031. The reversal of 22559404021 is 12040495522.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22559404021 - 2¹¹ = 22559401973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22559404001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1108155 + ... + 1128328.

It is an arithmetic number, because the mean of its divisors is an integer number (1771295328).

Almost surely, 2^22559404021 is an apocalyptic number.

It is an amenable number.

22559404021 is a deficient number, since it is larger than the sum of its proper divisors (5781321227).

22559404021 is a wasteful number, since it uses less digits than its factorization.

22559404021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236632.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 22559404021 its reverse (12040495522), we get a palindrome (34599899543).

The spelling of 22559404021 in words is "twenty-two billion, five hundred fifty-nine million, four hundred four thousand, twenty-one".