23920928947 has 4 divisors (see below), whose sum is σ = 24960969360. Its totient is φ = 22880888536.

The previous prime is 23920928887. The next prime is 23920928953. The reversal of 23920928947 is 74982902932.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23920928947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23920928957) 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, 520020172 + ... + 520020217.

It is an arithmetic number, because the mean of its divisors is an integer number (6240242340).

Almost surely, 2^23920928947 is an apocalyptic number.

23920928947 is a deficient number, since it is larger than the sum of its proper divisors (1040040413).

23920928947 is a wasteful number, since it uses less digits than its factorization.

23920928947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040040412.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 23920928947 in words is "twenty-three billion, nine hundred twenty million, nine hundred twenty-eight thousand, nine hundred forty-seven".