23405765217 has 16 divisors (see below), whose sum is σ = 31530270720. Its totient is φ = 15442740432.

The previous prime is 23405765177. The next prime is 23405765221. The reversal of 23405765217 is 71256750432.

It is not a de Polignac number, because 23405765217 - 2⁸ = 23405764961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23405765017) 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 15 ways as a sum of consecutive naturals, for example, 492384 + ... + 537822.

It is an arithmetic number, because the mean of its divisors is an integer number (1970641920).

Almost surely, 2^23405765217 is an apocalyptic number.

It is an amenable number.

23405765217 is a deficient number, since it is larger than the sum of its proper divisors (8124505503).

23405765217 is a wasteful number, since it uses less digits than its factorization.

23405765217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47212.

The product of its (nonzero) digits is 352800, while the sum is 42.

The spelling of 23405765217 in words is "twenty-three billion, four hundred five million, seven hundred sixty-five thousand, two hundred seventeen".