13506436123 has 4 divisors (see below), whose sum is σ = 13506797248. Its totient is φ = 13506075000.

The previous prime is 13506436117. The next prime is 13506436127. The reversal of 13506436123 is 32163460531.

13506436123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32163460531 = 401 ⋅80208131.

It is a cyclic number.

It is not a de Polignac number, because 13506436123 - 2²¹ = 13504338971 is a prime.

It is a super-2 number, since 2×13506436123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13506436127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117003 + ... + 201748.

It is an arithmetic number, because the mean of its divisors is an integer number (3376699312).

Almost surely, 2^13506436123 is an apocalyptic number.

13506436123 is a deficient number, since it is larger than the sum of its proper divisors (361125).

13506436123 is an equidigital number, since it uses as much as digits as its factorization.

13506436123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361124.

The product of its (nonzero) digits is 38880, while the sum is 34.

Adding to 13506436123 its reverse (32163460531), we get a palindrome (45669896654).

The spelling of 13506436123 in words is "thirteen billion, five hundred six million, four hundred thirty-six thousand, one hundred twenty-three".