22712891689 has 4 divisors (see below), whose sum is σ = 22731555924. Its totient is φ = 22694227456.

The previous prime is 22712891681. The next prime is 22712891717. The reversal of 22712891689 is 98619821722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98619821722 = 2 ⋅49309910861.

It can be written as a sum of positive squares in 2 ways, for example, as 6607251225 + 16105640464 = 81285^2 + 126908^2 .

It is a cyclic number.

It is not a de Polignac number, because 22712891689 - 2³ = 22712891681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22712891681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9330292 + ... + 9332725.

It is an arithmetic number, because the mean of its divisors is an integer number (5682888981).

Almost surely, 2^22712891689 is an apocalyptic number.

It is an amenable number.

22712891689 is a deficient number, since it is larger than the sum of its proper divisors (18664235).

22712891689 is a wasteful number, since it uses less digits than its factorization.

22712891689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18664234.

The product of its digits is 1741824, while the sum is 55.

The spelling of 22712891689 in words is "twenty-two billion, seven hundred twelve million, eight hundred ninety-one thousand, six hundred eighty-nine".