18086318 has 4 divisors (see below), whose sum is σ = 27129480. Its totient is φ = 9043158.

The previous prime is 18086279. The next prime is 18086357. The reversal of 18086318 is 81368081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81368081 = 631 ⋅128951.

It is an interprime number because it is at equal distance from previous prime (18086279) and next prime (18086357).

It is a super-2 number, since 2×18086318² = 654229797594248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4521578 + ... + 4521581.

It is an arithmetic number, because the mean of its divisors is an integer number (6782370).

Almost surely, 2^18086318 is an apocalyptic number.

18086318 is a deficient number, since it is larger than the sum of its proper divisors (9043162).

18086318 is an equidigital number, since it uses as much as digits as its factorization.

18086318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9043161.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 18086318 is about 4252.8011945070. The cubic root of 18086318 is about 262.4923922209.

The spelling of 18086318 in words is "eighteen million, eighty-six thousand, three hundred eighteen".