18844423 has 16 divisors (see below), whose sum is σ = 20966400. Its totient is φ = 16829280.

The previous prime is 18844417. The next prime is 18844457. The reversal of 18844423 is 32444881.

It is a happy number.

It is not a de Polignac number, because 18844423 - 2⁵ = 18844391 is a prime.

It is a super-2 number, since 2×18844423² = 710224556405858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18844493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60438 + ... + 60748.

It is an arithmetic number, because the mean of its divisors is an integer number (1310400).

Almost surely, 2^18844423 is an apocalyptic number.

18844423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18844423 is a deficient number, since it is larger than the sum of its proper divisors (2121977).

18844423 is a wasteful number, since it uses less digits than its factorization.

18844423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462.

The product of its digits is 24576, while the sum is 34.

The square root of 18844423 is about 4341.0163556476. The cubic root of 18844423 is about 266.1098487262.

The spelling of 18844423 in words is "eighteen million, eight hundred forty-four thousand, four hundred twenty-three".