18638148 has 24 divisors (see below), whose sum is σ = 44015328. Its totient is φ = 6137536.

The previous prime is 18638131. The next prime is 18638177. The reversal of 18638148 is 84183681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8361 + ... + 10352.

It is an arithmetic number, because the mean of its divisors is an integer number (1833972).

Almost surely, 2^18638148 is an apocalyptic number.

It is an amenable number.

18638148 is an abundant number, since it is smaller than the sum of its proper divisors (25377180).

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

18638148 is a wasteful number, since it uses less digits than its factorization.

18638148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18803 (or 18801 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 18638148 is about 4317.1921430485. The cubic root of 18638148 is about 265.1353195205.

It can be divided in two parts, 1863 and 8148, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 18638148 in words is "eighteen million, six hundred thirty-eight thousand, one hundred forty-eight".