20310102013 has 2 divisors, whose sum is σ = 20310102014. Its totient is φ = 20310102012.

The previous prime is 20310101969. The next prime is 20310102067. The reversal of 20310102013 is 31020101302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12973665604 + 7336436409 = 113902^2 + 85653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20310102013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20310101984 and 20310102002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20310102613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155051006 + 10155051007.

It is an arithmetic number, because the mean of its divisors is an integer number (10155051007).

Almost surely, 2^20310102013 is an apocalyptic number.

It is an amenable number.

20310102013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310102013 is an equidigital number, since it uses as much as digits as its factorization.

20310102013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20310102013 its reverse (31020101302), we get a palindrome (51330203315).

The spelling of 20310102013 in words is "twenty billion, three hundred ten million, one hundred two thousand, thirteen".