20307706613 has 2 divisors, whose sum is σ = 20307706614. Its totient is φ = 20307706612.

The previous prime is 20307706589. The next prime is 20307706667. The reversal of 20307706613 is 31660770302.

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., 11015132209 + 9292574404 = 104953^2 + 96398^2 .

It is a cyclic number.

It is not a de Polignac number, because 20307706613 - 2⁸ = 20307706357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20307706213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10153853306 + 10153853307.

It is an arithmetic number, because the mean of its divisors is an integer number (10153853307).

Almost surely, 2^20307706613 is an apocalyptic number.

It is an amenable number.

20307706613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20307706613 is an equidigital number, since it uses as much as digits as its factorization.

20307706613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 35.

The spelling of 20307706613 in words is "twenty billion, three hundred seven million, seven hundred six thousand, six hundred thirteen".