20798130313 has 4 divisors (see below), whose sum is σ = 20806542868. Its totient is φ = 20789717760.

The previous prime is 20798130277. The next prime is 20798130373. The reversal of 20798130313 is 31303189702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31303189702 = 2 ⋅15651594851.

It can be written as a sum of positive squares in 2 ways, for example, as 19344080889 + 1454049424 = 139083^2 + 38132^2 .

It is a cyclic number.

It is not a de Polignac number, because 20798130313 - 2⁹ = 20798129801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20798130373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4202568 + ... + 4207513.

It is an arithmetic number, because the mean of its divisors is an integer number (5201635717).

Almost surely, 2^20798130313 is an apocalyptic number.

It is an amenable number.

20798130313 is a deficient number, since it is larger than the sum of its proper divisors (8412555).

20798130313 is an equidigital number, since it uses as much as digits as its factorization.

20798130313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8412554.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 20798130313 in words is "twenty billion, seven hundred ninety-eight million, one hundred thirty thousand, three hundred thirteen".