20123422511 has 2 divisors, whose sum is σ = 20123422512. Its totient is φ = 20123422510.

The previous prime is 20123422489. The next prime is 20123422513. The reversal of 20123422511 is 11522432102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123422511 is a prime.

Together with 20123422513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123422513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061711255 + 10061711256.

It is an arithmetic number, because the mean of its divisors is an integer number (10061711256).

Almost surely, 2^20123422511 is an apocalyptic number.

20123422511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123422511 is an equidigital number, since it uses as much as digits as its factorization.

20123422511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 20123422511 its reverse (11522432102), we get a palindrome (31645854613).

The spelling of 20123422511 in words is "twenty billion, one hundred twenty-three million, four hundred twenty-two thousand, five hundred eleven".