18804330 has 72 divisors (see below), whose sum is σ = 50497668. Its totient is φ = 4854528.

The previous prime is 18804299. The next prime is 18804341. The reversal of 18804330 is 3340881.

It can be written as a sum of positive squares in 2 ways, for example, as 15992001 + 2812329 = 3999^2 + 1677^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18804294 and 18804303.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 166354 + ... + 166466.

Almost surely, 2^18804330 is an apocalyptic number.

18804330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18804330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25248834).

18804330 is an abundant number, since it is smaller than the sum of its proper divisors (31693338).

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

18804330 is a wasteful number, since it uses less digits than its factorization.

18804330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 18804330 is about 4336.3959690047. The cubic root of 18804330 is about 265.9209914782.

The spelling of 18804330 in words is "eighteen million, eight hundred four thousand, three hundred thirty".