20231231013 has 12 divisors (see below), whose sum is σ = 33397587808. Its totient is φ = 11560703400.

The previous prime is 20231230991. The next prime is 20231231047. The reversal of 20231231013 is 31013213202.

It is not a de Polignac number, because 20231231013 - 2³⁰ = 19157489189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231231063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160565263 + ... + 160565388.

Almost surely, 2^20231231013 is an apocalyptic number.

It is an amenable number.

20231231013 is a deficient number, since it is larger than the sum of its proper divisors (13166356795).

20231231013 is a wasteful number, since it uses less digits than its factorization.

20231231013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321130664 (or 321130661 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20231231013 its reverse (31013213202), we get a palindrome (51244444215).

The spelling of 20231231013 in words is "twenty billion, two hundred thirty-one million, two hundred thirty-one thousand, thirteen".