20312001130313 has 4 divisors (see below), whose sum is σ = 20448323285700. Its totient is φ = 20175678974928.

The previous prime is 20312001130279. The next prime is 20312001130339. The reversal of 20312001130313 is 31303110021302.

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 4887318289984 + 15424682840329 = 2210728^2 + 3927427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312001130313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312001130363) 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, 68161077470 + ... + 68161077767.

It is an arithmetic number, because the mean of its divisors is an integer number (5112080821425).

Almost surely, 2^{20312001130313} is an apocalyptic number.

It is an amenable number.

20312001130313 is a deficient number, since it is larger than the sum of its proper divisors (136322155387).

20312001130313 is a wasteful number, since it uses less digits than its factorization.

20312001130313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136322155386.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 20312001130313 its reverse (31303110021302), we get a palindrome (51615111151615).

The spelling of 20312001130313 in words is "twenty trillion, three hundred twelve billion, one million, one hundred thirty thousand, three hundred thirteen".