18671423 has 18 divisors (see below), whose sum is σ = 21094584. Its totient is φ = 16491904.

The previous prime is 18671407. The next prime is 18671449. The reversal of 18671423 is 32417681.

It is not a de Polignac number, because 18671423 - 2⁴ = 18671407 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 18671423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18671473) 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, 352265 + ... + 352317.

Almost surely, 2^18671423 is an apocalyptic number.

18671423 is a deficient number, since it is larger than the sum of its proper divisors (2423161).

18671423 is an equidigital number, since it uses as much as digits as its factorization.

18671423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 93 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 18671423 is about 4321.0442025048. The cubic root of 18671423 is about 265.2930092350.

The spelling of 18671423 in words is "eighteen million, six hundred seventy-one thousand, four hundred twenty-three".