18214085 has 4 divisors (see below), whose sum is σ = 21856908. Its totient is φ = 14571264.

The previous prime is 18214061. The next prime is 18214087. The reversal of 18214085 is 58041281.

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 7761796 + 10452289 = 2786^2 + 3233^2 .

It is a cyclic number.

It is not a de Polignac number, because 18214085 - 2⁸ = 18213829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18214087) by changing a digit.

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, 1821404 + ... + 1821413.

It is an arithmetic number, because the mean of its divisors is an integer number (5464227).

Almost surely, 2^18214085 is an apocalyptic number.

It is an amenable number.

18214085 is a deficient number, since it is larger than the sum of its proper divisors (3642823).

18214085 is an equidigital number, since it uses as much as digits as its factorization.

18214085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642822.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 18214085 is about 4267.7962697392. The cubic root of 18214085 is about 263.1090498923.

The spelling of 18214085 in words is "eighteen million, two hundred fourteen thousand, eighty-five".