18505066 has 8 divisors (see below), whose sum is σ = 27794340. Its totient is φ = 9240288.

The previous prime is 18505057. The next prime is 18505073. The reversal of 18505066 is 66050581.

It can be written as a sum of positive squares in 2 ways, for example, as 18275625 + 229441 = 4275^2 + 479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 4101 + ... + 7336.

Almost surely, 2^18505066 is an apocalyptic number.

18505066 is a deficient number, since it is larger than the sum of its proper divisors (9289274).

18505066 is a wasteful number, since it uses less digits than its factorization.

18505066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12248.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 18505066 is about 4301.7515037482. The cubic root of 18505066 is about 264.5027628496.

The spelling of 18505066 in words is "eighteen million, five hundred five thousand, sixty-six".