11423434523 has 4 divisors (see below), whose sum is σ = 11568035040. Its totient is φ = 11278834008.

The previous prime is 11423434511. The next prime is 11423434571. The reversal of 11423434523 is 32543432411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32543432411 = 7 ⋅4649061773.

It is a cyclic number.

It is not a de Polignac number, because 11423434523 - 2²² = 11419240219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11423434523.

It is not an unprimeable number, because it can be changed into a prime (11423434123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72300140 + ... + 72300297.

It is an arithmetic number, because the mean of its divisors is an integer number (2892008760).

Almost surely, 2^11423434523 is an apocalyptic number.

11423434523 is a deficient number, since it is larger than the sum of its proper divisors (144600517).

11423434523 is an equidigital number, since it uses as much as digits as its factorization.

11423434523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144600516.

The product of its digits is 34560, while the sum is 32.

Adding to 11423434523 its reverse (32543432411), we get a palindrome (43966866934).

The spelling of 11423434523 in words is "eleven billion, four hundred twenty-three million, four hundred thirty-four thousand, five hundred twenty-three".