20231131201313 has 4 divisors (see below), whose sum is σ = 20232628375428. Its totient is φ = 20229634027200.

The previous prime is 20231131201297. The next prime is 20231131201349. The reversal of 20231131201313 is 31310213113202.

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 3824969797009 + 16406161404304 = 1955753^2 + 4050452^2 .

It is a cyclic number.

It is not a de Polignac number, because 20231131201313 - 2⁴ = 20231131201297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20231131209313) 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, 748566788 + ... + 748593813.

It is an arithmetic number, because the mean of its divisors is an integer number (5058157093857).

Almost surely, 2^{20231131201313} is an apocalyptic number.

It is an amenable number.

20231131201313 is a deficient number, since it is larger than the sum of its proper divisors (1497174115).

20231131201313 is a wasteful number, since it uses less digits than its factorization.

20231131201313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497174114.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 20231131201313 its reverse (31310213113202), we get a palindrome (51541344314515).

The spelling of 20231131201313 in words is "twenty trillion, two hundred thirty-one billion, one hundred thirty-one million, two hundred one thousand, three hundred thirteen".