205986850 has 24 divisors (see below), whose sum is σ = 399795840. Its totient is φ = 78811920.

The previous prime is 205986839. The next prime is 205986857. The reversal of 205986850 is 58689502.

It is a junction number, because it is equal to n+sod(n) for n = 205986797 and 205986806.

It is not an unprimeable number, because it can be changed into a prime (205986857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88410 + ... + 90709.

It is an arithmetic number, because the mean of its divisors is an integer number (16658160).

Almost surely, 2^205986850 is an apocalyptic number.

205986850 is a deficient number, since it is larger than the sum of its proper divisors (193808990).

205986850 is a wasteful number, since it uses less digits than its factorization.

205986850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179154 (or 179149 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 205986850 is about 14352.2419851395. The cubic root of 205986850 is about 590.5814912474.

The spelling of 205986850 in words is "two hundred five million, nine hundred eighty-six thousand, eight hundred fifty".