204493904999 has 4 divisors (see below), whose sum is σ = 204519710064. Its totient is φ = 204468099936.

The previous prime is 204493904977. The next prime is 204493905023. The reversal of 204493904999 is 999409394402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204493904999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204493904899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12890642 + ... + 12906495.

It is an arithmetic number, because the mean of its divisors is an integer number (51129927516).

Almost surely, 2^204493904999 is an apocalyptic number.

204493904999 is a deficient number, since it is larger than the sum of its proper divisors (25805065).

204493904999 is an equidigital number, since it uses as much as digits as its factorization.

204493904999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25805064.

The product of its (nonzero) digits is 22674816, while the sum is 62.

The spelling of 204493904999 in words is "two hundred four billion, four hundred ninety-three million, nine hundred four thousand, nine hundred ninety-nine".