22652138721 has 4 divisors (see below), whose sum is σ = 30202851632. Its totient is φ = 15101425812.

The previous prime is 22652138647. The next prime is 22652138737. The reversal of 22652138721 is 12783125622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22652138721 - 2¹⁷ = 22652007649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22652138721.

It is not an unprimeable number, because it can be changed into a prime (22652138771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3775356451 + ... + 3775356456.

It is an arithmetic number, because the mean of its divisors is an integer number (7550712908).

Almost surely, 2^22652138721 is an apocalyptic number.

It is an amenable number.

22652138721 is a deficient number, since it is larger than the sum of its proper divisors (7550712911).

22652138721 is an equidigital number, since it uses as much as digits as its factorization.

22652138721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7550712910.

The product of its digits is 80640, while the sum is 39.

The spelling of 22652138721 in words is "twenty-two billion, six hundred fifty-two million, one hundred thirty-eight thousand, seven hundred twenty-one".