20348579049517 has 2 divisors, whose sum is σ = 20348579049518. Its totient is φ = 20348579049516.

The previous prime is 20348579049481. The next prime is 20348579049607. The reversal of 20348579049517 is 71594097584302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11711528128521 + 8637050920996 = 3422211^2 + 2938886^2 .

It is a cyclic number.

It is not a de Polignac number, because 20348579049517 - 2³⁵ = 20314219311149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20348579041517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10174289524758 + 10174289524759.

It is an arithmetic number, because the mean of its divisors is an integer number (10174289524759).

Almost surely, 2^{20348579049517} is an apocalyptic number.

It is an amenable number.

20348579049517 is a deficient number, since it is larger than the sum of its proper divisors (1).

20348579049517 is an equidigital number, since it uses as much as digits as its factorization.

20348579049517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76204800, while the sum is 64.

The spelling of 20348579049517 in words is "twenty trillion, three hundred forty-eight billion, five hundred seventy-nine million, forty-nine thousand, five hundred seventeen".