20105030510017 has 2 divisors, whose sum is σ = 20105030510018. Its totient is φ = 20105030510016.

The previous prime is 20105030510003. The next prime is 20105030510063. The reversal of 20105030510017 is 71001503050102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19044111969936 + 1060918540081 = 4363956^2 + 1030009^2 .

It is a cyclic number.

It is not a de Polignac number, because 20105030510017 - 2¹⁵ = 20105030477249 is a prime.

It is a super-2 number, since 2×20105030510017² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20105030509973 and 20105030510000.

It is not a weakly prime, because it can be changed into another prime (20105030570017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052515255008 + 10052515255009.

It is an arithmetic number, because the mean of its divisors is an integer number (10052515255009).

Almost surely, 2^{20105030510017} is an apocalyptic number.

It is an amenable number.

20105030510017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20105030510017 is an equidigital number, since it uses as much as digits as its factorization.

20105030510017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 25.

Adding to 20105030510017 its reverse (71001503050102), we get a palindrome (91106533560119).

The spelling of 20105030510017 in words is "twenty trillion, one hundred five billion, thirty million, five hundred ten thousand, seventeen".