204920340481 has 2 divisors, whose sum is σ = 204920340482. Its totient is φ = 204920340480.

The previous prime is 204920340479. The next prime is 204920340487. The reversal of 204920340481 is 184043029402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204199149456 + 721191025 = 451884^2 + 26855^2 .

It is a cyclic number.

It is not a de Polignac number, because 204920340481 - 2¹ = 204920340479 is a prime.

It is a super-2 number, since 2×204920340481² (a number of 23 digits) contains 22 as substring.

Together with 204920340479, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 204920340481.

It is not a weakly prime, because it can be changed into another prime (204920340487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102460170240 + 102460170241.

It is an arithmetic number, because the mean of its divisors is an integer number (102460170241).

Almost surely, 2^204920340481 is an apocalyptic number.

It is an amenable number.

204920340481 is a deficient number, since it is larger than the sum of its proper divisors (1).

204920340481 is an equidigital number, since it uses as much as digits as its factorization.

204920340481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

Adding to 204920340481 its reverse (184043029402), we get a palindrome (388963369883).

The spelling of 204920340481 in words is "two hundred four billion, nine hundred twenty million, three hundred forty thousand, four hundred eighty-one".