205909050 has 24 divisors (see below), whose sum is σ = 510654816. Its totient is φ = 54909040.

The previous prime is 205909043. The next prime is 205909063. The reversal of 205909050 is 50909502.

205909050 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205908999 and 205909017.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 686214 + ... + 686513.

It is an arithmetic number, because the mean of its divisors is an integer number (21277284).

Almost surely, 2^205909050 is an apocalyptic number.

205909050 is an abundant number, since it is smaller than the sum of its proper divisors (304745766).

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

205909050 is a wasteful number, since it uses less digits than its factorization.

205909050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372742 (or 1372737 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 205909050 is about 14349.5313512323. The cubic root of 205909050 is about 590.5071288534.

The spelling of 205909050 in words is "two hundred five million, nine hundred nine thousand, fifty".