205135634 has 32 divisors (see below), whose sum is σ = 356918400. Its totient is φ = 87389440.

The previous prime is 205135627. The next prime is 205135639. The reversal of 205135634 is 436531502.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205135597 and 205135606.

It is not an unprimeable number, because it can be changed into a prime (205135639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99587 + ... + 101625.

It is an arithmetic number, because the mean of its divisors is an integer number (11153700).

Almost surely, 2^205135634 is an apocalyptic number.

205135634 is a deficient number, since it is larger than the sum of its proper divisors (151782766).

205135634 is a wasteful number, since it uses less digits than its factorization.

205135634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 205135634 is about 14322.5568248131. The cubic root of 205135634 is about 589.7668656615.

The spelling of 205135634 in words is "two hundred five million, one hundred thirty-five thousand, six hundred thirty-four".