205835986020 has 96 divisors (see below), whose sum is σ = 659099750400. Its totient is φ = 47017897344.

The previous prime is 205835986019. The next prime is 205835986063. The reversal of 205835986020 is 20689538502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 497601 + ... + 811959.

It is an arithmetic number, because the mean of its divisors is an integer number (6865622400).

Almost surely, 2^205835986020 is an apocalyptic number.

205835986020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205835986020 is an abundant number, since it is smaller than the sum of its proper divisors (453263764380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205835986020 is a wasteful number, since it uses less digits than its factorization.

205835986020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315937 (or 315935 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 205835986020 in words is "two hundred five billion, eight hundred thirty-five million, nine hundred eighty-six thousand, twenty".