18474 has 8 divisors (see below), whose sum is σ = 36960. Its totient is φ = 6156.

The previous prime is 18461. The next prime is 18481. The reversal of 18474 is 47481.

It is a sphenic number, since it is the product of 3 distinct primes.

18474 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 13.

It is an unprimeable number.

18474 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534 + ... + 1545.

It is an arithmetic number, because the mean of its divisors is an integer number (4620).

2^{18474} is an apocalyptic number.

18474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18480).

18474 is a wasteful number, since it uses less digits than its factorization.

18474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084.

The product of its digits is 896, while the sum is 24.

The square root of 18474 is about 135.9190935814. The cubic root of 18474 is about 26.4354665650.

Subtracting from 18474 its product of digits (896), we obtain a triangular number (17578 = T_{187}).

The spelling of 18474 in words is "eighteen thousand, four hundred seventy-four".

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