18741384 has 48 divisors (see below), whose sum is σ = 51171120. Its totient is φ = 6196320.

The previous prime is 18741377. The next prime is 18741397. The reversal of 18741384 is 48314781.

It is a super-3 number, since 3×18741384³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8439 + ... + 10425.

It is an arithmetic number, because the mean of its divisors is an integer number (1066065).

Almost surely, 2^18741384 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 18741384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25585560).

18741384 is an abundant number, since it is smaller than the sum of its proper divisors (32429736).

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

18741384 is a wasteful number, since it uses less digits than its factorization.

18741384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130 (or 2123 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 18741384 is about 4329.1320146191. The cubic root of 18741384 is about 265.6239433222.

The spelling of 18741384 in words is "eighteen million, seven hundred forty-one thousand, three hundred eighty-four".