20123243411 has 2 divisors, whose sum is σ = 20123243412. Its totient is φ = 20123243410.

The previous prime is 20123243377. The next prime is 20123243423. The reversal of 20123243411 is 11434232102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123243411 is a prime.

It is not a weakly prime, because it can be changed into another prime (20123243471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061621705 + 10061621706.

It is an arithmetic number, because the mean of its divisors is an integer number (10061621706).

Almost surely, 2^20123243411 is an apocalyptic number.

20123243411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123243411 is an equidigital number, since it uses as much as digits as its factorization.

20123243411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20123243411 its reverse (11434232102), we get a palindrome (31557475513).

It can be divided in two parts, 2012 and 3243411, that added together give a palindrome (3245423).

The spelling of 20123243411 in words is "twenty billion, one hundred twenty-three million, two hundred forty-three thousand, four hundred eleven".