18431248 has 20 divisors (see below), whose sum is σ = 38957328. Its totient is φ = 8377760.

The previous prime is 18431243. The next prime is 18431249. The reversal of 18431248 is 84213481.

It is not an unprimeable number, because it can be changed into a prime (18431243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52186 + ... + 52537.

Almost surely, 2^18431248 is an apocalyptic number.

It is an amenable number.

18431248 is an abundant number, since it is smaller than the sum of its proper divisors (20526080).

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

18431248 is a wasteful number, since it uses less digits than its factorization.

18431248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104742 (or 104736 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 18431248 is about 4293.1629365772. The cubic root of 18431248 is about 264.1505874882.

The spelling of 18431248 in words is "eighteen million, four hundred thirty-one thousand, two hundred forty-eight".