205339427823 has 16 divisors (see below), whose sum is σ = 274075176960. Its totient is φ = 136748378976.

The previous prime is 205339427809. The next prime is 205339427873. The reversal of 205339427823 is 328724933502.

It is not a de Polignac number, because 205339427823 - 2⁶ = 205339427759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205339427873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27422386 + ... + 27429872.

It is an arithmetic number, because the mean of its divisors is an integer number (17129698560).

Almost surely, 2^205339427823 is an apocalyptic number.

205339427823 is a deficient number, since it is larger than the sum of its proper divisors (68735749137).

205339427823 is a wasteful number, since it uses less digits than its factorization.

205339427823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15926.

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 205339427823 in words is "two hundred five billion, three hundred thirty-nine million, four hundred twenty-seven thousand, eight hundred twenty-three".