11403423423 has 18 divisors (see below), whose sum is σ = 19160855064. Its totient is φ = 6516241704.

The previous prime is 11403423403. The next prime is 11403423467. The reversal of 11403423423 is 32432430411.

11403423423 is a `hidden beast` number, since 1 + 1 + 403 + 4 + 234 + 23 = 666.

It is not a de Polignac number, because 11403423423 - 2⁸ = 11403423167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403423403) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12928611 + ... + 12929492.

It is an arithmetic number, because the mean of its divisors is an integer number (1064491948).

Almost surely, 2^11403423423 is an apocalyptic number.

11403423423 is a deficient number, since it is larger than the sum of its proper divisors (7757431641).

11403423423 is a wasteful number, since it uses less digits than its factorization.

11403423423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25858123 (or 25858113 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 11403423423 its reverse (32432430411), we get a palindrome (43835853834).

The spelling of 11403423423 in words is "eleven billion, four hundred three million, four hundred twenty-three thousand, four hundred twenty-three".