18814338 has 12 divisors (see below), whose sum is σ = 40764438. Its totient is φ = 6271440.

The previous prime is 18814331. The next prime is 18814339. The reversal of 18814338 is 83341881.

It can be written as a sum of positive squares in only one way, i.e., 15000129 + 3814209 = 3873^2 + 1953^2 .

It is not an unprimeable number, because it can be changed into a prime (18814331) 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 5 ways as a sum of consecutive naturals, for example, 522603 + ... + 522638.

Almost surely, 2^18814338 is an apocalyptic number.

18814338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18814338 is an abundant number, since it is smaller than the sum of its proper divisors (21950100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18814338 is a wasteful number, since it uses less digits than its factorization.

18814338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045249 (or 1045246 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 18814338 is about 4337.5497691669. The cubic root of 18814338 is about 265.9681590771.

The spelling of 18814338 in words is "eighteen million, eight hundred fourteen thousand, three hundred thirty-eight".