20312342231 has 2 divisors, whose sum is σ = 20312342232. Its totient is φ = 20312342230.

The previous prime is 20312342227. The next prime is 20312342243. The reversal of 20312342231 is 13224321302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20312342231 - 2² = 20312342227 is a prime.

It is a super-2 number, since 2×20312342231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20312342197 and 20312342206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20312342261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156171115 + 10156171116.

It is an arithmetic number, because the mean of its divisors is an integer number (10156171116).

Almost surely, 2^20312342231 is an apocalyptic number.

20312342231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312342231 is an equidigital number, since it uses as much as digits as its factorization.

20312342231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20312342231 its reverse (13224321302), we get a palindrome (33536663533).

The spelling of 20312342231 in words is "twenty billion, three hundred twelve million, three hundred forty-two thousand, two hundred thirty-one".