20331000031 has 2 divisors, whose sum is σ = 20331000032. Its totient is φ = 20331000030.

The previous prime is 20331000007. The next prime is 20331000061. The reversal of 20331000031 is 13000013302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20331000031 - 2¹⁵ = 20330967263 is a prime.

It is a super-2 number, since 2×20331000031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20330999975 and 20331000020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20331000061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165500015 + 10165500016.

It is an arithmetic number, because the mean of its divisors is an integer number (10165500016).

Almost surely, 2^20331000031 is an apocalyptic number.

20331000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331000031 is an equidigital number, since it uses as much as digits as its factorization.

20331000031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 20331000031 its reverse (13000013302), we get a palindrome (33331013333).

The spelling of 20331000031 in words is "twenty billion, three hundred thirty-one million, thirty-one", and thus it is an aban number.