11505331423 has 4 divisors (see below), whose sum is σ = 12005563248. Its totient is φ = 11005099600.

The previous prime is 11505331379. The next prime is 11505331429. The reversal of 11505331423 is 32413350511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32413350511 = 5651 ⋅5735861.

It is a cyclic number.

It is not a de Polignac number, because 11505331423 - 2¹³ = 11505323231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11505331391 and 11505331400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11505331429) 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, 250115878 + ... + 250115923.

It is an arithmetic number, because the mean of its divisors is an integer number (3001390812).

Almost surely, 2^11505331423 is an apocalyptic number.

11505331423 is a deficient number, since it is larger than the sum of its proper divisors (500231825).

11505331423 is an equidigital number, since it uses as much as digits as its factorization.

11505331423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500231824.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 11505331423 its reverse (32413350511), we get a palindrome (43918681934).

The spelling of 11505331423 in words is "eleven billion, five hundred five million, three hundred thirty-one thousand, four hundred twenty-three".