20231031031 has 4 divisors (see below), whose sum is σ = 20427448912. Its totient is φ = 20034613152.

The previous prime is 20231030971. The next prime is 20231031047. The reversal of 20231031031 is 13013013202.

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

It is a cyclic number.

It is not a de Polignac number, because 20231031031 - 2¹⁷ = 20230899959 is a prime.

It is a super-2 number, since 2×20231031031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20231030996 and 20231031014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231031131) 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, 98208786 + ... + 98208991.

It is an arithmetic number, because the mean of its divisors is an integer number (5106862228).

Almost surely, 2^20231031031 is an apocalyptic number.

20231031031 is a deficient number, since it is larger than the sum of its proper divisors (196417881).

20231031031 is a wasteful number, since it uses less digits than its factorization.

20231031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196417880.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20231031031 its reverse (13013013202), we get a palindrome (33244044233).

The spelling of 20231031031 in words is "twenty billion, two hundred thirty-one million, thirty-one thousand, thirty-one".