18474293423 has 4 divisors (see below), whose sum is σ = 18561849528. Its totient is φ = 18386737320.

The previous prime is 18474293393. The next prime is 18474293489. The reversal of 18474293423 is 32439247481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32439247481 = 83 ⋅390834307.

It is a cyclic number.

It is not a de Polignac number, because 18474293423 - 2³⁰ = 17400551599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18474293923) 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, 43777736 + ... + 43778157.

It is an arithmetic number, because the mean of its divisors is an integer number (4640462382).

Almost surely, 2^18474293423 is an apocalyptic number.

18474293423 is a deficient number, since it is larger than the sum of its proper divisors (87556105).

18474293423 is an equidigital number, since it uses as much as digits as its factorization.

18474293423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87556104.

The product of its digits is 1161216, while the sum is 47.

The spelling of 18474293423 in words is "eighteen billion, four hundred seventy-four million, two hundred ninety-three thousand, four hundred twenty-three".