20413514256613 has 2 divisors, whose sum is σ = 20413514256614. Its totient is φ = 20413514256612.

The previous prime is 20413514256593. The next prime is 20413514256661. The reversal of 20413514256613 is 31665241531402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20290637367169 + 122876889444 = 4504513^2 + 350538^2 .

It is a cyclic number.

It is not a de Polignac number, because 20413514256613 - 2⁹ = 20413514256101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20413514256613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20413514256673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206757128306 + 10206757128307.

It is an arithmetic number, because the mean of its divisors is an integer number (10206757128307).

Almost surely, 2^{20413514256613} is an apocalyptic number.

It is an amenable number.

20413514256613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413514256613 is an equidigital number, since it uses as much as digits as its factorization.

20413514256613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 20413514256613 in words is "twenty trillion, four hundred thirteen billion, five hundred fourteen million, two hundred fifty-six thousand, six hundred thirteen".