20422464689 has 4 divisors (see below), whose sum is σ = 22279052400. Its totient is φ = 18565876980.

The previous prime is 20422464661. The next prime is 20422464731. The reversal of 20422464689 is 98646422402.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20422464689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20422764689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 928293839 + ... + 928293860.

It is an arithmetic number, because the mean of its divisors is an integer number (5569763100).

Almost surely, 2^20422464689 is an apocalyptic number.

It is an amenable number.

20422464689 is a deficient number, since it is larger than the sum of its proper divisors (1856587711).

20422464689 is a wasteful number, since it uses less digits than its factorization.

20422464689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856587710.

The product of its (nonzero) digits is 1327104, while the sum is 47.

The spelling of 20422464689 in words is "twenty billion, four hundred twenty-two million, four hundred sixty-four thousand, six hundred eighty-nine".