18190330 has 16 divisors (see below), whose sum is σ = 32826024. Its totient is φ = 7257600.

The previous prime is 18190327. The next prime is 18190343. The reversal of 18190330 is 3309181.

It can be written as a sum of positive squares in 4 ways, for example, as 6017209 + 12173121 = 2453^2 + 3489^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18190295 and 18190304.

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, 2230 + ... + 6430.

Almost surely, 2^18190330 is an apocalyptic number.

18190330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18190330 is a deficient number, since it is larger than the sum of its proper divisors (14635694).

18190330 is a wasteful number, since it uses less digits than its factorization.

18190330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4641.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 18190330 is about 4265.0123094781. The cubic root of 18190330 is about 262.9946169389.

The spelling of 18190330 in words is "eighteen million, one hundred ninety thousand, three hundred thirty".