18004330 has 16 divisors (see below), whose sum is σ = 33198984. Its totient is φ = 7025920.

The previous prime is 18004321. The next prime is 18004367. The reversal of 18004330 is 3340081.

It can be written as a sum of positive squares in 4 ways, for example, as 12201049 + 5803281 = 3493^2 + 2409^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18004298 and 18004307.

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, 21547 + ... + 22366.

Almost surely, 2^18004330 is an apocalyptic number.

18004330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18004330 is a deficient number, since it is larger than the sum of its proper divisors (15194654).

18004330 is a wasteful number, since it uses less digits than its factorization.

18004330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43961.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 18004330 is about 4243.1509518281. The cubic root of 18004330 is about 262.0951521995.

The spelling of 18004330 in words is "eighteen million, four thousand, three hundred thirty".