204663994 has 4 divisors (see below), whose sum is σ = 306995994. Its totient is φ = 102331996.

The previous prime is 204663989. The next prime is 204663997. The reversal of 204663994 is 499366402.

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

It can be written as a sum of positive squares in only one way, i.e., 204347025 + 316969 = 14295^2 + 563^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204663994.

It is not an unprimeable number, because it can be changed into a prime (204663997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51165997 + ... + 51166000.

Almost surely, 2^204663994 is an apocalyptic number.

204663994 is a deficient number, since it is larger than the sum of its proper divisors (102332000).

204663994 is a wasteful number, since it uses less digits than its factorization.

204663994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102331999.

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 204663994 is about 14306.0824127362. The cubic root of 204663994 is about 589.3145290159.

The spelling of 204663994 in words is "two hundred four million, six hundred sixty-three thousand, nine hundred ninety-four".