20003220613 has 2 divisors, whose sum is σ = 20003220614. Its totient is φ = 20003220612.

The previous prime is 20003220581. The next prime is 20003220617. The reversal of 20003220613 is 31602230002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11954798244 + 8048422369 = 109338^2 + 89713^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003220613 - 2⁵ = 20003220581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20003220617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001610306 + 10001610307.

It is an arithmetic number, because the mean of its divisors is an integer number (10001610307).

Almost surely, 2^20003220613 is an apocalyptic number.

It is an amenable number.

20003220613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003220613 is an equidigital number, since it uses as much as digits as its factorization.

20003220613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20003220613 its reverse (31602230002), we get a palindrome (51605450615).

The spelling of 20003220613 in words is "twenty billion, three million, two hundred twenty thousand, six hundred thirteen".