18904330 has 16 divisors (see below), whose sum is σ = 34380360. Its totient is φ = 7483392.

The previous prime is 18904313. The next prime is 18904349. The reversal of 18904330 is 3340981.

It can be written as a sum of positive squares in 4 ways, for example, as 8874441 + 10029889 = 2979^2 + 3167^2 .

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, 8775 + ... + 10714.

Almost surely, 2^18904330 is an apocalyptic number.

18904330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18904330 is a deficient number, since it is larger than the sum of its proper divisors (15476030).

18904330 is a wasteful number, since it uses less digits than its factorization.

18904330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19593.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 18904330 is about 4347.9109926492. The cubic root of 18904330 is about 266.3915408972.

The spelling of 18904330 in words is "eighteen million, nine hundred four thousand, three hundred thirty".