20330312231 has 2 divisors, whose sum is σ = 20330312232. Its totient is φ = 20330312230.

The previous prime is 20330312203. The next prime is 20330312239. The reversal of 20330312231 is 13221303302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20330312231 - 2¹⁴ = 20330295847 is a prime.

It is a super-2 number, since 2×20330312231² (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 (20330312239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165156115 + 10165156116.

It is an arithmetic number, because the mean of its divisors is an integer number (10165156116).

Almost surely, 2^20330312231 is an apocalyptic number.

20330312231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330312231 is an equidigital number, since it uses as much as digits as its factorization.

20330312231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20330312231 its reverse (13221303302), we get a palindrome (33551615533).

The spelling of 20330312231 in words is "twenty billion, three hundred thirty million, three hundred twelve thousand, two hundred thirty-one".