18017874 has 48 divisors (see below), whose sum is σ = 46163520. Its totient is φ = 4969440.

The previous prime is 18017843. The next prime is 18017887. The reversal of 18017874 is 47871081.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1189 + ... + 6119.

It is an arithmetic number, because the mean of its divisors is an integer number (961740).

Almost surely, 2^18017874 is an apocalyptic number.

18017874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18017874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23081760).

18017874 is an abundant number, since it is smaller than the sum of its proper divisors (28145646).

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

18017874 is a wasteful number, since it uses less digits than its factorization.

18017874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975 (or 4972 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 18017874 is about 4244.7466355485. The cubic root of 18017874 is about 262.1608572638.

The spelling of 18017874 in words is "eighteen million, seventeen thousand, eight hundred seventy-four".