205420944839 has 12 divisors (see below), whose sum is σ = 226975459200. Its totient is φ = 185768563200.

The previous prime is 205420944769. The next prime is 205420944877. The reversal of 205420944839 is 938449024502.

It is not a de Polignac number, because 205420944839 - 2⁸ = 205420944583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205420944539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4421114 + ... + 4467335.

It is an arithmetic number, because the mean of its divisors is an integer number (18914621600).

Almost surely, 2^205420944839 is an apocalyptic number.

205420944839 is a deficient number, since it is larger than the sum of its proper divisors (21554514361).

205420944839 is a wasteful number, since it uses less digits than its factorization.

205420944839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8888662 (or 8888651 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 205420944839 in words is "two hundred five billion, four hundred twenty million, nine hundred forty-four thousand, eight hundred thirty-nine".