20123333231 has 2 divisors, whose sum is σ = 20123333232. Its totient is φ = 20123333230.

The previous prime is 20123333161. The next prime is 20123333239. The reversal of 20123333231 is 13233332102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20123333231 - 2³⁴ = 2943464047 is a prime.

It is a super-2 number, since 2×20123333231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20123333197 and 20123333206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123333239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061666615 + 10061666616.

It is an arithmetic number, because the mean of its divisors is an integer number (10061666616).

Almost surely, 2^20123333231 is an apocalyptic number.

20123333231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123333231 is an equidigital number, since it uses as much as digits as its factorization.

20123333231 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 20123333231 its reverse (13233332102), we get a palindrome (33356665333).

The spelling of 20123333231 in words is "twenty billion, one hundred twenty-three million, three hundred thirty-three thousand, two hundred thirty-one".