20312321031 has 6 divisors (see below), whose sum is σ = 29340019280. Its totient is φ = 13541547348.

The previous prime is 20312320979. The next prime is 20312321041. The reversal of 20312321031 is 13012321302.

20312321031 is a `hidden beast` number, since 2 + 0 + 312 + 321 + 0 + 31 = 666.

It is not a de Polignac number, because 20312321031 - 2²⁶ = 20245212167 is a prime.

It is a super-2 number, since 2×20312321031² (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 = 20312320995 and 20312321013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312321041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1128462271 + ... + 1128462288.

Almost surely, 2^20312321031 is an apocalyptic number.

20312321031 is a deficient number, since it is larger than the sum of its proper divisors (9027698249).

20312321031 is a wasteful number, since it uses less digits than its factorization.

20312321031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256924565 (or 2256924562 counting only the distinct ones).

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

Adding to 20312321031 its reverse (13012321302), we get a palindrome (33324642333).

The spelling of 20312321031 in words is "twenty billion, three hundred twelve million, three hundred twenty-one thousand, thirty-one".