204640413 has 8 divisors (see below), whose sum is σ = 273819168. Its totient is φ = 135944304.

The previous prime is 204640391. The next prime is 204640417. The reversal of 204640413 is 314046402.

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

It is not a de Polignac number, because 204640413 - 2⁶ = 204640349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204640417) 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, 119670 + ... + 121367.

It is an arithmetic number, because the mean of its divisors is an integer number (34227396).

Almost surely, 2^204640413 is an apocalyptic number.

It is an amenable number.

204640413 is a deficient number, since it is larger than the sum of its proper divisors (69178755).

204640413 is a wasteful number, since it uses less digits than its factorization.

204640413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241323.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 204640413 is about 14305.2582290569. The cubic root of 204640413 is about 589.2918949099.

Adding to 204640413 its reverse (314046402), we get a palindrome (518686815).

The spelling of 204640413 in words is "two hundred four million, six hundred forty thousand, four hundred thirteen".