20012050517 has 2 divisors, whose sum is σ = 20012050518. Its totient is φ = 20012050516.

The previous prime is 20012050511. The next prime is 20012050537. The reversal of 20012050517 is 71505021002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14180284561 + 5831765956 = 119081^2 + 76366^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012050517 - 2⁴ = 20012050501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012050492 and 20012050501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012050511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006025258 + 10006025259.

It is an arithmetic number, because the mean of its divisors is an integer number (10006025259).

Almost surely, 2^20012050517 is an apocalyptic number.

It is an amenable number.

20012050517 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012050517 is an equidigital number, since it uses as much as digits as its factorization.

20012050517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

Adding to 20012050517 its reverse (71505021002), we get a palindrome (91517071519).

The spelling of 20012050517 in words is "twenty billion, twelve million, fifty thousand, five hundred seventeen".