20431012031 has 2 divisors, whose sum is σ = 20431012032. Its totient is φ = 20431012030.

The previous prime is 20431012027. The next prime is 20431012039. The reversal of 20431012031 is 13021013402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20431012031 - 2² = 20431012027 is a prime.

It is a super-2 number, since 2×20431012031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20431012039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215506015 + 10215506016.

It is an arithmetic number, because the mean of its divisors is an integer number (10215506016).

Almost surely, 2^20431012031 is an apocalyptic number.

20431012031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431012031 is an equidigital number, since it uses as much as digits as its factorization.

20431012031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20431012031 its reverse (13021013402), we get a palindrome (33452025433).

The spelling of 20431012031 in words is "twenty billion, four hundred thirty-one million, twelve thousand, thirty-one".