18084384 has 60 divisors (see below), whose sum is σ = 53193294. Its totient is φ = 6027264.

The previous prime is 18084383. The next prime is 18084397. The reversal of 18084384 is 48348081.

It can be written as a sum of positive squares in only one way, i.e., 17139600 + 944784 = 4140^2 + 972^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18084383) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 897 + ... + 6080.

Almost surely, 2^18084384 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 18084384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26596647).

18084384 is an abundant number, since it is smaller than the sum of its proper divisors (35108910).

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

18084384 is an equidigital number, since it uses as much as digits as its factorization.

18084384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6999 (or 6982 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 18084384 is about 4252.5738088833. The cubic root of 18084384 is about 262.4830356384.

The spelling of 18084384 in words is "eighteen million, eighty-four thousand, three hundred eighty-four".