18027346 has 4 divisors (see below), whose sum is σ = 27041022. Its totient is φ = 9013672.

The previous prime is 18027341. The next prime is 18027349. The reversal of 18027346 is 64372081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64372081 = 17 ⋅3786593.

It can be written as a sum of positive squares in only one way, i.e., 17766225 + 261121 = 4215^2 + 511^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18027341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4506835 + ... + 4506838.

Almost surely, 2^18027346 is an apocalyptic number.

18027346 is a deficient number, since it is larger than the sum of its proper divisors (9013676).

18027346 is an equidigital number, since it uses as much as digits as its factorization.

18027346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9013675.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 18027346 is about 4245.8622210336. The cubic root of 18027346 is about 262.2067885545.

The spelling of 18027346 in words is "eighteen million, twenty-seven thousand, three hundred forty-six".