18730066 has 8 divisors (see below), whose sum is σ = 28854540. Its totient is φ = 9111888.

The previous prime is 18730009. The next prime is 18730091. The reversal of 18730066 is 66003781.

It can be written as a sum of positive squares in 2 ways, for example, as 12752041 + 5978025 = 3571^2 + 2445^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126481 + ... + 126628.

Almost surely, 2^18730066 is an apocalyptic number.

18730066 is a deficient number, since it is larger than the sum of its proper divisors (10124474).

18730066 is a wasteful number, since it uses less digits than its factorization.

18730066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253148.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 18730066 is about 4327.8246267611. The cubic root of 18730066 is about 265.5704620857.

The spelling of 18730066 in words is "eighteen million, seven hundred thirty thousand, sixty-six".