18338148 has 18 divisors (see below), whose sum is σ = 46354854. Its totient is φ = 6112704.

The previous prime is 18338137. The next prime is 18338149. The reversal of 18338148 is 84183381.

It can be written as a sum of positive squares in only one way, i.e., 18301284 + 36864 = 4278^2 + 192^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 509393 = 18338148 / (1 + 8 + 3 + 3 + 8 + 1 + 4 + 8).

It is not an unprimeable number, because it can be changed into a prime (18338149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 254661 + ... + 254732.

Almost surely, 2^18338148 is an apocalyptic number.

18338148 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18338148 is an abundant number, since it is smaller than the sum of its proper divisors (28016706).

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

18338148 is a wasteful number, since it uses less digits than its factorization.

18338148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509403 (or 509398 counting only the distinct ones).

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

The square root of 18338148 is about 4282.3063879176. The cubic root of 18338148 is about 263.7050769907.

The spelling of 18338148 in words is "eighteen million, three hundred thirty-eight thousand, one hundred forty-eight".