204413663 has 4 divisors (see below), whose sum is σ = 211462440. Its totient is φ = 197364888.

The previous prime is 204413639. The next prime is 204413681. The reversal of 204413663 is 366314402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204413663 - 2¹⁶ = 204348127 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 7048747 = 204413663 / (2 + 0 + 4 + 4 + 1 + 3 + 6 + 6 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204413263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3524345 + ... + 3524402.

It is an arithmetic number, because the mean of its divisors is an integer number (52865610).

Almost surely, 2^204413663 is an apocalyptic number.

204413663 is a deficient number, since it is larger than the sum of its proper divisors (7048777).

204413663 is an equidigital number, since it uses as much as digits as its factorization.

204413663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7048776.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 204413663 is about 14297.3306249803. The cubic root of 204413663 is about 589.0741612464.

The spelling of 204413663 in words is "two hundred four million, four hundred thirteen thousand, six hundred sixty-three".