205136630 has 16 divisors (see below), whose sum is σ = 369420480. Its totient is φ = 82015872.

The previous prime is 205136611. The next prime is 205136639. The reversal of 205136630 is 36631502.

205136630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 205136630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205136639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27902 + ... + 34478.

It is an arithmetic number, because the mean of its divisors is an integer number (23088780).

Almost surely, 2^205136630 is an apocalyptic number.

205136630 is a deficient number, since it is larger than the sum of its proper divisors (164283850).

205136630 is a wasteful number, since it uses less digits than its factorization.

205136630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9703.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 205136630 is about 14322.5915950990. The cubic root of 205136630 is about 589.7678201631.

The spelling of 205136630 in words is "two hundred five million, one hundred thirty-six thousand, six hundred thirty".