18042248 has 64 divisors (see below), whose sum is σ = 42086400. Its totient is φ = 7076160.

The previous prime is 18042239. The next prime is 18042251. The reversal of 18042248 is 84224081.

It is a self number, because there is not a number n which added to its sum of digits gives 18042248.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32711 + ... + 33257.

It is an arithmetic number, because the mean of its divisors is an integer number (657600).

Almost surely, 2^18042248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18042248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21043200).

18042248 is an abundant number, since it is smaller than the sum of its proper divisors (24044152).

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

18042248 is a wasteful number, since it uses less digits than its factorization.

18042248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 18042248 is about 4247.6167435398. The cubic root of 18042248 is about 262.2790182548.

The spelling of 18042248 in words is "eighteen million, forty-two thousand, two hundred forty-eight".