22740555504721 has 32 divisors (see below), whose sum is σ = 23300581167360. Its totient is φ = 22188312115200.

The previous prime is 22740555504703. The next prime is 22740555504749. The reversal of 22740555504721 is 12740555504722.

It is a cyclic number.

It is not a de Polignac number, because 22740555504721 - 2¹¹ = 22740555502673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22740555504221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9747343671 + ... + 9747346003.

It is an arithmetic number, because the mean of its divisors is an integer number (728143161480).

Almost surely, 2^{22740555504721} is an apocalyptic number.

It is an amenable number.

22740555504721 is a deficient number, since it is larger than the sum of its proper divisors (560025662639).

22740555504721 is a wasteful number, since it uses less digits than its factorization.

22740555504721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5257.

The product of its (nonzero) digits is 3920000, while the sum is 49.

Subtracting from 22740555504721 its reverse (12740555504722), we obtain a palindrome (9999999999999).

The spelling of 22740555504721 in words is "twenty-two trillion, seven hundred forty billion, five hundred fifty-five million, five hundred four thousand, seven hundred twenty-one".