18270085 has 4 divisors (see below), whose sum is σ = 21924108. Its totient is φ = 14616064.

The previous prime is 18270079. The next prime is 18270097. The reversal of 18270085 is 58007281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2643876 + 15626209 = 1626^2 + 3953^2 .

It is a cyclic number.

It is not a de Polignac number, because 18270085 - 2⁷ = 18269957 is a prime.

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 a Duffinian number.

It is a congruent number.

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, 1827004 + ... + 1827013.

It is an arithmetic number, because the mean of its divisors is an integer number (5481027).

Almost surely, 2^18270085 is an apocalyptic number.

It is an amenable number.

18270085 is a deficient number, since it is larger than the sum of its proper divisors (3654023).

18270085 is an equidigital number, since it uses as much as digits as its factorization.

18270085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654022.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 18270085 is about 4274.3519976717. The cubic root of 18270085 is about 263.3784207724.

The spelling of 18270085 in words is "eighteen million, two hundred seventy thousand, eighty-five".