205338902172 has 24 divisors (see below), whose sum is σ = 480124377600. Its totient is φ = 68303404656.

The previous prime is 205338902159. The next prime is 205338902221. The reversal of 205338902172 is 271209833502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17856022 + ... + 17867517.

It is an arithmetic number, because the mean of its divisors is an integer number (20005182400).

Almost surely, 2^205338902172 is an apocalyptic number.

It is an amenable number.

205338902172 is an abundant number, since it is smaller than the sum of its proper divisors (274785475428).

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

205338902172 is a wasteful number, since it uses less digits than its factorization.

205338902172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35724025 (or 35724023 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 205338902172 in words is "two hundred five billion, three hundred thirty-eight million, nine hundred two thousand, one hundred seventy-two".