23809667857 has 4 divisors (see below), whose sum is σ = 23810055280. Its totient is φ = 23809280436.

The previous prime is 23809667851. The next prime is 23809667867. The reversal of 23809667857 is 75876690832.

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 not a de Polignac number, because 23809667857 - 2¹⁵ = 23809635089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23809667795 and 23809667804.

It is not an unprimeable number, because it can be changed into a prime (23809667851) 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, 78807 + ... + 232012.

It is an arithmetic number, because the mean of its divisors is an integer number (5952513820).

Almost surely, 2^23809667857 is an apocalyptic number.

It is an amenable number.

23809667857 is a deficient number, since it is larger than the sum of its proper divisors (387423).

23809667857 is an equidigital number, since it uses as much as digits as its factorization.

23809667857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387422.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 23809667857 in words is "twenty-three billion, eight hundred nine million, six hundred sixty-seven thousand, eight hundred fifty-seven".