205918 has 8 divisors (see below), whose sum is σ = 311400. Its totient is φ = 102120.

The previous prime is 205913. The next prime is 205937. The reversal of 205918 is 819502.

205918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 205892 and 205901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48 + ... + 643.

It is an arithmetic number, because the mean of its divisors is an integer number (38925).

2²⁰⁵⁹¹⁸ is an apocalyptic number.

205918 is a deficient number, since it is larger than the sum of its proper divisors (105482).

205918 is a wasteful number, since it uses less digits than its factorization.

205918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 205918 is about 453.7818859320. The cubic root of 205918 is about 59.0515684349.

The spelling of 205918 in words is "two hundred five thousand, nine hundred eighteen".