18844424 has 16 divisors (see below), whose sum is σ = 35405100. Its totient is φ = 9403072.

The previous prime is 18844417. The next prime is 18844457. The reversal of 18844424 is 42444881.

It can be written as a sum of positive squares in 2 ways, for example, as 18576100 + 268324 = 4310^2 + 518^2 .

It is a super-2 number, since 2×18844424² = 710224631783552, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342 + ... + 6570.

Almost surely, 2^18844424 is an apocalyptic number.

It is an amenable number.

18844424 is a deficient number, since it is larger than the sum of its proper divisors (16560676).

18844424 is a wasteful number, since it uses less digits than its factorization.

18844424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4792 (or 4788 counting only the distinct ones).

The product of its digits is 32768, while the sum is 35.

The square root of 18844424 is about 4341.0164708280. The cubic root of 18844424 is about 266.1098534333.

The spelling of 18844424 in words is "eighteen million, eight hundred forty-four thousand, four hundred twenty-four".