18036384 has 48 divisors (see below), whose sum is σ = 47900160. Its totient is φ = 5941760.

The previous prime is 18036383. The next prime is 18036401. The reversal of 18036384 is 48363081.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×18036384² = 650622295590912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18036383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7489 + ... + 9599.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^18036384 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 18036384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23950080).

18036384 is an abundant number, since it is smaller than the sum of its proper divisors (29863776).

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

18036384 is a wasteful number, since it uses less digits than its factorization.

18036384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213 (or 2205 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 18036384 is about 4246.9264180110. The cubic root of 18036384 is about 262.2506003101.

The spelling of 18036384 in words is "eighteen million, thirty-six thousand, three hundred eighty-four".