18774832423 has 4 divisors (see below), whose sum is σ = 18890015608. Its totient is φ = 18659649240.

The previous prime is 18774832339. The next prime is 18774832457. The reversal of 18774832423 is 32423847781.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18774832423 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 (18774832123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57591348 + ... + 57591673.

It is an arithmetic number, because the mean of its divisors is an integer number (4722503902).

Almost surely, 2^18774832423 is an apocalyptic number.

18774832423 is a deficient number, since it is larger than the sum of its proper divisors (115183185).

18774832423 is a wasteful number, since it uses less digits than its factorization.

18774832423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115183184.

The product of its digits is 1806336, while the sum is 49.

The spelling of 18774832423 in words is "eighteen billion, seven hundred seventy-four million, eight hundred thirty-two thousand, four hundred twenty-three".