23839199815 has 4 divisors (see below), whose sum is σ = 28607039784. Its totient is φ = 19071359848.

The previous prime is 23839199803. The next prime is 23839199821. The reversal of 23839199815 is 51899193832.

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-23839199815 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23839199815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2383919977 + ... + 2383919986.

It is an arithmetic number, because the mean of its divisors is an integer number (7151759946).

Almost surely, 2^23839199815 is an apocalyptic number.

23839199815 is a deficient number, since it is larger than the sum of its proper divisors (4767839969).

23839199815 is an equidigital number, since it uses as much as digits as its factorization.

23839199815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4767839968.

The product of its digits is 4199040, while the sum is 58.

The spelling of 23839199815 in words is "twenty-three billion, eight hundred thirty-nine million, one hundred ninety-nine thousand, eight hundred fifteen".