204812044789 has 4 divisors (see below), whose sum is σ = 223431321600. Its totient is φ = 186192767980.

The previous prime is 204812044783. The next prime is 204812044819. The reversal of 204812044789 is 987440218402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204812044789 - 2³ = 204812044781 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 (204812044781) 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, 9309638389 + ... + 9309638410.

It is an arithmetic number, because the mean of its divisors is an integer number (55857830400).

Almost surely, 2^204812044789 is an apocalyptic number.

It is an amenable number.

204812044789 is a deficient number, since it is larger than the sum of its proper divisors (18619276811).

204812044789 is a wasteful number, since it uses less digits than its factorization.

204812044789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18619276810.

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 204812044789 in words is "two hundred four billion, eight hundred twelve million, forty-four thousand, seven hundred eighty-nine".