20017058813 has 2 divisors, whose sum is σ = 20017058814. Its totient is φ = 20017058812.

The previous prime is 20017058783. The next prime is 20017058821. The reversal of 20017058813 is 31885071002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14274753529 + 5742305284 = 119477^2 + 75778^2 .

It is a cyclic number.

It is not a de Polignac number, because 20017058813 - 2⁸ = 20017058557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20017058863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10008529406 + 10008529407.

It is an arithmetic number, because the mean of its divisors is an integer number (10008529407).

Almost surely, 2^20017058813 is an apocalyptic number.

It is an amenable number.

20017058813 is a deficient number, since it is larger than the sum of its proper divisors (1).

20017058813 is an equidigital number, since it uses as much as digits as its factorization.

20017058813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 20017058813 in words is "twenty billion, seventeen million, fifty-eight thousand, eight hundred thirteen".