20031023231 has 8 divisors (see below), whose sum is σ = 20792479680. Its totient is φ = 19274282272.

The previous prime is 20031023213. The next prime is 20031023251. The reversal of 20031023231 is 13232013002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20031023231 is a prime.

It is a super-2 number, since 2×20031023231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031023251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1170215 + ... + 1187208.

It is an arithmetic number, because the mean of its divisors is an integer number (2599059960).

Almost surely, 2^20031023231 is an apocalyptic number.

20031023231 is a deficient number, since it is larger than the sum of its proper divisors (761456449).

20031023231 is a wasteful number, since it uses less digits than its factorization.

20031023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357745.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20031023231 its reverse (13232013002), we get a palindrome (33263036233).

The spelling of 20031023231 in words is "twenty billion, thirty-one million, twenty-three thousand, two hundred thirty-one".