20329503613 has 2 divisors, whose sum is σ = 20329503614. Its totient is φ = 20329503612.

The previous prime is 20329503599. The next prime is 20329503619. The reversal of 20329503613 is 31630592302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15011885529 + 5317618084 = 122523^2 + 72922^2 .

It is a cyclic number.

It is not a de Polignac number, because 20329503613 - 2³³ = 11739569021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20329503619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10164751806 + 10164751807.

It is an arithmetic number, because the mean of its divisors is an integer number (10164751807).

Almost surely, 2^20329503613 is an apocalyptic number.

It is an amenable number.

20329503613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20329503613 is an equidigital number, since it uses as much as digits as its factorization.

20329503613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 34.

The spelling of 20329503613 in words is "twenty billion, three hundred twenty-nine million, five hundred three thousand, six hundred thirteen".