20313519613 has 2 divisors, whose sum is σ = 20313519614. Its totient is φ = 20313519612.

The previous prime is 20313519599. The next prime is 20313519617. The reversal of 20313519613 is 31691531302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18112314724 + 2201204889 = 134582^2 + 46917^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313519613 - 2⁵ = 20313519581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20313519617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156759806 + 10156759807.

It is an arithmetic number, because the mean of its divisors is an integer number (10156759807).

Almost surely, 2^20313519613 is an apocalyptic number.

It is an amenable number.

20313519613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313519613 is an equidigital number, since it uses as much as digits as its factorization.

20313519613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 34.

The spelling of 20313519613 in words is "twenty billion, three hundred thirteen million, five hundred nineteen thousand, six hundred thirteen".