204112515493 has 2 divisors, whose sum is σ = 204112515494. Its totient is φ = 204112515492.

The previous prime is 204112515491. The next prime is 204112515533. The reversal of 204112515493 is 394515211402.

204112515493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176683193569 + 27429321924 = 420337^2 + 165618^2 .

It is a cyclic number.

It is not a de Polignac number, because 204112515493 - 2¹ = 204112515491 is a prime.

Together with 204112515491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204112515491) 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, 102056257746 + 102056257747.

It is an arithmetic number, because the mean of its divisors is an integer number (102056257747).

Almost surely, 2^204112515493 is an apocalyptic number.

It is an amenable number.

204112515493 is a deficient number, since it is larger than the sum of its proper divisors (1).

204112515493 is an equidigital number, since it uses as much as digits as its factorization.

204112515493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 204112515493 its reverse (394515211402), we get a palindrome (598627726895).

The spelling of 204112515493 in words is "two hundred four billion, one hundred twelve million, five hundred fifteen thousand, four hundred ninety-three".