18816086 has 4 divisors (see below), whose sum is σ = 28224132. Its totient is φ = 9408042.

The previous prime is 18816073. The next prime is 18816097. The reversal of 18816086 is 68061881.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4704020 + ... + 4704023.

It is an arithmetic number, because the mean of its divisors is an integer number (7056033).

Almost surely, 2^18816086 is an apocalyptic number.

18816086 is a deficient number, since it is larger than the sum of its proper divisors (9408046).

18816086 is an equidigital number, since it uses as much as digits as its factorization.

18816086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9408045.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 18816086 is about 4337.7512607341. The cubic root of 18816086 is about 265.9763956668.

The spelling of 18816086 in words is "eighteen million, eight hundred sixteen thousand, eighty-six".