20311130002013 has 4 divisors (see below), whose sum is σ = 20362291538940. Its totient is φ = 20259968465088.

The previous prime is 20311130001997. The next prime is 20311130002021. The reversal of 20311130002013 is 31020003111302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7485405986809 + 12825724015204 = 2735947^2 + 3581302^2 .

It is a cyclic number.

It is not a de Polignac number, because 20311130002013 - 2⁴ = 20311130001997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20311130001982 and 20311130002000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311130002043) 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, 25580767868 + ... + 25580768661.

It is an arithmetic number, because the mean of its divisors is an integer number (5090572884735).

Almost surely, 2^{20311130002013} is an apocalyptic number.

It is an amenable number.

20311130002013 is a deficient number, since it is larger than the sum of its proper divisors (51161536927).

20311130002013 is an equidigital number, since it uses as much as digits as its factorization.

20311130002013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51161536926.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20311130002013 its reverse (31020003111302), we get a palindrome (51331133113315).

The spelling of 20311130002013 in words is "twenty trillion, three hundred eleven billion, one hundred thirty million, two thousand, thirteen".