20123323331 has 2 divisors, whose sum is σ = 20123323332. Its totient is φ = 20123323330.

The previous prime is 20123323307. The next prime is 20123323361. The reversal of 20123323331 is 13332332102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123323331 is a prime.

It is a super-2 number, since 2×20123323331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20123323297 and 20123323306.

It is not a weakly prime, because it can be changed into another prime (20123323361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061661665 + 10061661666.

It is an arithmetic number, because the mean of its divisors is an integer number (10061661666).

Almost surely, 2^20123323331 is an apocalyptic number.

20123323331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123323331 is an equidigital number, since it uses as much as digits as its factorization.

20123323331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 20123323331 its reverse (13332332102), we get a palindrome (33455655433).

The spelling of 20123323331 in words is "twenty billion, one hundred twenty-three million, three hundred twenty-three thousand, three hundred thirty-one".