20134111523 has 2 divisors, whose sum is σ = 20134111524. Its totient is φ = 20134111522.

The previous prime is 20134111513. The next prime is 20134111559. The reversal of 20134111523 is 32511143102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20134111523 - 2⁴ = 20134111507 is a prime.

It is not a weakly prime, because it can be changed into another prime (20134111513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10067055761 + 10067055762.

It is an arithmetic number, because the mean of its divisors is an integer number (10067055762).

Almost surely, 2^20134111523 is an apocalyptic number.

20134111523 is a deficient number, since it is larger than the sum of its proper divisors (1).

20134111523 is an equidigital number, since it uses as much as digits as its factorization.

20134111523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 20134111523 its reverse (32511143102), we get a palindrome (52645254625).

The spelling of 20134111523 in words is "twenty billion, one hundred thirty-four million, one hundred eleven thousand, five hundred twenty-three".