18064273 has 4 divisors (see below), whose sum is σ = 18134820. Its totient is φ = 17993728.

The previous prime is 18064271. The next prime is 18064279. The reversal of 18064273 is 37246081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37246081 = 41 ⋅908441.

It can be written as a sum of positive squares in 2 ways, for example, as 17909824 + 154449 = 4232^2 + 393^2 .

It is a cyclic number.

It is not a de Polignac number, because 18064273 - 2¹ = 18064271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18064271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34888 + ... + 35401.

It is an arithmetic number, because the mean of its divisors is an integer number (4533705).

Almost surely, 2^18064273 is an apocalyptic number.

It is an amenable number.

18064273 is a deficient number, since it is larger than the sum of its proper divisors (70547).

18064273 is an equidigital number, since it uses as much as digits as its factorization.

18064273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70546.

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

The square root of 18064273 is about 4250.2085831168. The cubic root of 18064273 is about 262.3857002001.

The spelling of 18064273 in words is "eighteen million, sixty-four thousand, two hundred seventy-three".