18838066 has 16 divisors (see below), whose sum is σ = 30520728. Its totient is φ = 8668800.

The previous prime is 18838033. The next prime is 18838093. The reversal of 18838066 is 66083881.

It can be written as a sum of positive squares in 4 ways, for example, as 8732025 + 10106041 = 2955^2 + 3179^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10086 + ... + 11806.

Almost surely, 2^18838066 is an apocalyptic number.

18838066 is a deficient number, since it is larger than the sum of its proper divisors (11682662).

18838066 is a wasteful number, since it uses less digits than its factorization.

18838066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 18838066 is about 4340.2840920843. The cubic root of 18838066 is about 266.0799220902.

The spelling of 18838066 in words is "eighteen million, eight hundred thirty-eight thousand, sixty-six".