18104320 has 120 divisors (see below), whose sum is σ = 49543704. Its totient is φ = 6291456.

The previous prime is 18104287. The next prime is 18104347. The reversal of 18104320 is 2340181.

It can be written as a sum of positive squares in 4 ways, for example, as 1327104 + 16777216 = 1152^2 + 4096^2 .

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1064952 + ... + 1064968.

Almost surely, 2^18104320 is an apocalyptic number.

18104320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18104320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24771852).

18104320 is an abundant number, since it is smaller than the sum of its proper divisors (31439384).

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

18104320 is an equidigital number, since it uses as much as digits as its factorization.

18104320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 18104320 is about 4254.9171554802. The cubic root of 18104320 is about 262.5794528953.

The spelling of 18104320 in words is "eighteen million, one hundred four thousand, three hundred twenty".