20310417557513 has 2 divisors, whose sum is σ = 20310417557514. Its totient is φ = 20310417557512.

The previous prime is 20310417557501. The next prime is 20310417557569. The reversal of 20310417557513 is 31575571401302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19283454211849 + 1026963345664 = 4391293^2 + 1013392^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310417557513 - 2⁴⁰ = 19210905929737 is a prime.

It is a super-2 number, since 2×20310417557513² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20310417557113) 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, 10155208778756 + 10155208778757.

It is an arithmetic number, because the mean of its divisors is an integer number (10155208778757).

Almost surely, 2^{20310417557513} is an apocalyptic number.

It is an amenable number.

20310417557513 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310417557513 is an equidigital number, since it uses as much as digits as its factorization.

20310417557513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 441000, while the sum is 44.

Adding to 20310417557513 its reverse (31575571401302), we get a palindrome (51885988958815).

The spelling of 20310417557513 in words is "twenty trillion, three hundred ten billion, four hundred seventeen million, five hundred fifty-seven thousand, five hundred thirteen".