22744244721 has 8 divisors (see below), whose sum is σ = 33082537824. Its totient is φ = 13784390720.

The previous prime is 22744244711. The next prime is 22744244723. The reversal of 22744244721 is 12744244722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22744244721 - 2²⁶ = 22677135857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22744244721.

It is not an unprimeable number, because it can be changed into a prime (22744244723) 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, 344609736 + ... + 344609801.

It is an arithmetic number, because the mean of its divisors is an integer number (4135317228).

Almost surely, 2^22744244721 is an apocalyptic number.

It is an amenable number.

22744244721 is a deficient number, since it is larger than the sum of its proper divisors (10338293103).

22744244721 is a wasteful number, since it uses less digits than its factorization.

22744244721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689219551.

The product of its digits is 200704, while the sum is 39.

Subtracting from 22744244721 its reverse (12744244722), we obtain a palindrome (9999999999).

The spelling of 22744244721 in words is "twenty-two billion, seven hundred forty-four million, two hundred forty-four thousand, seven hundred twenty-one".