205017838 has 4 divisors (see below), whose sum is σ = 307526760. Its totient is φ = 102508918.

The previous prime is 205017797. The next prime is 205017853. The reversal of 205017838 is 838710502.

205017838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51254458 + ... + 51254461.

It is an arithmetic number, because the mean of its divisors is an integer number (76881690).

Almost surely, 2^205017838 is an apocalyptic number.

205017838 is a deficient number, since it is larger than the sum of its proper divisors (102508922).

205017838 is a wasteful number, since it uses less digits than its factorization.

205017838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102508921.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 205017838 is about 14318.4439797067. The cubic root of 205017838 is about 589.6539558461.

The spelling of 205017838 in words is "two hundred five million, seventeen thousand, eight hundred thirty-eight".