11431323423 has 48 divisors (see below), whose sum is σ = 18440866080. Its totient is φ = 6995289600.

The previous prime is 11431323361. The next prime is 11431323461. The reversal of 11431323423 is 32432313411.

It is a happy number.

11431323423 is a `hidden beast` number, since 1 + 1 + 4 + 313 + 2 + 342 + 3 = 666.

It is not a de Polignac number, because 11431323423 - 2¹² = 11431319327 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431323473) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 818983 + ... + 832823.

It is an arithmetic number, because the mean of its divisors is an integer number (384184710).

Almost surely, 2^11431323423 is an apocalyptic number.

11431323423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11431323423 is a deficient number, since it is larger than the sum of its proper divisors (7009542657).

11431323423 is a wasteful number, since it uses less digits than its factorization.

11431323423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14057 (or 14038 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 11431323423 its reverse (32432313411), we get a palindrome (43863636834).

The spelling of 11431323423 in words is "eleven billion, four hundred thirty-one million, three hundred twenty-three thousand, four hundred twenty-three".