23921805923 has 4 divisors (see below), whose sum is σ = 25180848360. Its totient is φ = 22662763488.

The previous prime is 23921805899. The next prime is 23921805953. The reversal of 23921805923 is 32950812932.

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

It is a cyclic number.

It is not a de Polignac number, because 23921805923 - 2⁸ = 23921805667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23921805953) 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, 629521190 + ... + 629521227.

It is an arithmetic number, because the mean of its divisors is an integer number (6295212090).

Almost surely, 2^23921805923 is an apocalyptic number.

23921805923 is a deficient number, since it is larger than the sum of its proper divisors (1259042437).

23921805923 is a wasteful number, since it uses less digits than its factorization.

23921805923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259042436.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 23921805923 in words is "twenty-three billion, nine hundred twenty-one million, eight hundred five thousand, nine hundred twenty-three".