204489954913 has 2 divisors, whose sum is σ = 204489954914. Its totient is φ = 204489954912.

The previous prime is 204489954899. The next prime is 204489954931. The reversal of 204489954913 is 319459984402.

204489954913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (204489954931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165480544849 + 39009410064 = 406793^2 + 197508^2 .

It is a cyclic number.

It is not a de Polignac number, because 204489954913 - 2¹³ = 204489946721 is a prime.

It is a super-2 number, since 2×204489954913² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204489954983) 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 as a sum of consecutive naturals, namely, 102244977456 + 102244977457.

It is an arithmetic number, because the mean of its divisors is an integer number (102244977457).

Almost surely, 2^204489954913 is an apocalyptic number.

It is an amenable number.

204489954913 is a deficient number, since it is larger than the sum of its proper divisors (1).

204489954913 is an equidigital number, since it uses as much as digits as its factorization.

204489954913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 204489954913 in words is "two hundred four billion, four hundred eighty-nine million, nine hundred fifty-four thousand, nine hundred thirteen".