204644084947 has 4 divisors (see below), whose sum is σ = 215414826280. Its totient is φ = 193873343616.

The previous prime is 204644084929. The next prime is 204644084963. The reversal of 204644084947 is 749480446402.

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 204644084947 - 2²³ = 204635696339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204644084894 and 204644084903.

It is not an unprimeable number, because it can be changed into a prime (204644084987) 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, 5385370638 + ... + 5385370675.

It is an arithmetic number, because the mean of its divisors is an integer number (53853706570).

Almost surely, 2^204644084947 is an apocalyptic number.

204644084947 is a deficient number, since it is larger than the sum of its proper divisors (10770741333).

204644084947 is a wasteful number, since it uses less digits than its factorization.

204644084947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10770741332.

The product of its (nonzero) digits is 6193152, while the sum is 52.

The spelling of 204644084947 in words is "two hundred four billion, six hundred forty-four million, eighty-four thousand, nine hundred forty-seven".