20115323017 has 2 divisors, whose sum is σ = 20115323018. Its totient is φ = 20115323016.

The previous prime is 20115322999. The next prime is 20115323051. The reversal of 20115323017 is 71032351102.

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., 17767823616 + 2347499401 = 133296^2 + 48451^2 .

It is a cyclic number.

It is not a de Polignac number, because 20115323017 - 2⁷ = 20115322889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20115322982 and 20115323000.

It is not a weakly prime, because it can be changed into another prime (20115323057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10057661508 + 10057661509.

It is an arithmetic number, because the mean of its divisors is an integer number (10057661509).

Almost surely, 2^20115323017 is an apocalyptic number.

It is an amenable number.

20115323017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20115323017 is an equidigital number, since it uses as much as digits as its factorization.

20115323017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

Adding to 20115323017 its reverse (71032351102), we get a palindrome (91147674119).

The spelling of 20115323017 in words is "twenty billion, one hundred fifteen million, three hundred twenty-three thousand, seventeen".