18748244 has 12 divisors (see below), whose sum is σ = 32896500. Its totient is φ = 9349248.

The previous prime is 18748241. The next prime is 18748271. The reversal of 18748244 is 44284781.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8584900 + 10163344 = 2930^2 + 3188^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18748198 and 18748207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18748241) by changing a digit.

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, 4469 + ... + 7580.

It is an arithmetic number, because the mean of its divisors is an integer number (2741375).

Almost surely, 2^18748244 is an apocalyptic number.

It is an amenable number.

18748244 is a deficient number, since it is larger than the sum of its proper divisors (14148256).

18748244 is a wasteful number, since it uses less digits than its factorization.

18748244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12442 (or 12440 counting only the distinct ones).

The product of its digits is 57344, while the sum is 38.

The square root of 18748244 is about 4329.9242487600. The cubic root of 18748244 is about 265.6563485770.

The spelling of 18748244 in words is "eighteen million, seven hundred forty-eight thousand, two hundred forty-four".