20231320331 has 2 divisors, whose sum is σ = 20231320332. Its totient is φ = 20231320330.

The previous prime is 20231320309. The next prime is 20231320337. The reversal of 20231320331 is 13302313202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20231320331 - 2²⁶ = 20164211467 is a prime.

It is a super-2 number, since 2×20231320331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20231320337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115660165 + 10115660166.

It is an arithmetic number, because the mean of its divisors is an integer number (10115660166).

Almost surely, 2^20231320331 is an apocalyptic number.

20231320331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20231320331 is an equidigital number, since it uses as much as digits as its factorization.

20231320331 is an evil number, because the sum of its binary digits is even.

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

Adding to 20231320331 its reverse (13302313202), we get a palindrome (33533633533).

The spelling of 20231320331 in words is "twenty billion, two hundred thirty-one million, three hundred twenty thousand, three hundred thirty-one".