204564634 has 8 divisors (see below), whose sum is σ = 306909108. Its totient is φ = 102261600.

The previous prime is 204564611. The next prime is 204564649. The reversal of 204564634 is 436465402.

It can be written as a sum of positive squares in 2 ways, for example, as 199515625 + 5049009 = 14125^2 + 2247^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 204564634.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9934 + ... + 22534.

Almost surely, 2^204564634 is an apocalyptic number.

204564634 is a deficient number, since it is larger than the sum of its proper divisors (102344474).

204564634 is a wasteful number, since it uses less digits than its factorization.

204564634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20720.

The product of its (nonzero) digits is 69120, while the sum is 34.

The square root of 204564634 is about 14302.6093423543. The cubic root of 204564634 is about 589.2191470378.

It can be divided in two parts, 20 and 4564634, that added together give a palindrome (4564654).

The spelling of 204564634 in words is "two hundred four million, five hundred sixty-four thousand, six hundred thirty-four".