2101807613 has 2 divisors, whose sum is σ = 2101807614. Its totient is φ = 2101807612.

The previous prime is 2101807601. The next prime is 2101807619. The reversal of 2101807613 is 3167081012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2016189604 + 85618009 = 44902^2 + 9253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101807613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101807619) 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, 1050903806 + 1050903807.

It is an arithmetic number, because the mean of its divisors is an integer number (1050903807).

Almost surely, 2^2101807613 is an apocalyptic number.

It is an amenable number.

2101807613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101807613 is an equidigital number, since it uses as much as digits as its factorization.

2101807613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 2101807613 is about 45845.4753819829. The cubic root of 2101807613 is about 1280.9464868442.

Adding to 2101807613 its reverse (3167081012), we get a palindrome (5268888625).

The spelling of 2101807613 in words is "two billion, one hundred one million, eight hundred seven thousand, six hundred thirteen".