20326139017 has 2 divisors, whose sum is σ = 20326139018. Its totient is φ = 20326139016.

The previous prime is 20326138919. The next prime is 20326139047. The reversal of 20326139017 is 71093162302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13387415616 + 6938723401 = 115704^2 + 83299^2 .

It is a cyclic number.

It is not a de Polignac number, because 20326139017 - 2¹¹ = 20326136969 is a prime.

It is not a weakly prime, because it can be changed into another prime (20326139047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10163069508 + 10163069509.

It is an arithmetic number, because the mean of its divisors is an integer number (10163069509).

Almost surely, 2^20326139017 is an apocalyptic number.

It is an amenable number.

20326139017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20326139017 is an equidigital number, since it uses as much as digits as its factorization.

20326139017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 20326139017 in words is "twenty billion, three hundred twenty-six million, one hundred thirty-nine thousand, seventeen".