18748423 has 4 divisors (see below), whose sum is σ = 18863608. Its totient is φ = 18633240.

The previous prime is 18748417. The next prime is 18748447. The reversal of 18748423 is 32484781.

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

It is a cyclic number.

It is not a de Polignac number, because 18748423 - 2⁵ = 18748391 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 (18748403) 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, 57348 + ... + 57673.

It is an arithmetic number, because the mean of its divisors is an integer number (4715902).

Almost surely, 2^18748423 is an apocalyptic number.

18748423 is a deficient number, since it is larger than the sum of its proper divisors (115185).

18748423 is a wasteful number, since it uses less digits than its factorization.

18748423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115184.

The product of its digits is 43008, while the sum is 37.

The square root of 18748423 is about 4329.9449188183. The cubic root of 18748423 is about 265.6571940310.

The spelling of 18748423 in words is "eighteen million, seven hundred forty-eight thousand, four hundred twenty-three".