204490020449 has 24 divisors (see below), whose sum is σ = 243556655904. Its totient is φ = 171599828400.

The previous prime is 204490020353. The next prime is 204490020467. The reversal of 204490020449 is 944020094402.

204490020449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 204490020449 - 2¹⁶ = 204489954913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204490020479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229607 + ... + 679484.

It is an arithmetic number, because the mean of its divisors is an integer number (10148193996).

Almost surely, 2^204490020449 is an apocalyptic number.

It is an amenable number.

204490020449 is a deficient number, since it is larger than the sum of its proper divisors (39066635455).

204490020449 is an equidigital number, since it uses as much as digits as its factorization.

204490020449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909150 (or 909115 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

It can be divided in two parts, 2044900 and 20449, that multiplied together give a square (41816160100 = 204490²).

The spelling of 204490020449 in words is "two hundred four billion, four hundred ninety million, twenty thousand, four hundred forty-nine".