18908086 has 4 divisors (see below), whose sum is σ = 28362132. Its totient is φ = 9454042.

The previous prime is 18908083. The next prime is 18908107. The reversal of 18908086 is 68080981.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18908083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4727020 + ... + 4727023.

It is an arithmetic number, because the mean of its divisors is an integer number (7090533).

Almost surely, 2^18908086 is an apocalyptic number.

18908086 is a deficient number, since it is larger than the sum of its proper divisors (9454046).

18908086 is an equidigital number, since it uses as much as digits as its factorization.

18908086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9454045.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 18908086 is about 4348.3429027619. The cubic root of 18908086 is about 266.4091823647.

The spelling of 18908086 in words is "eighteen million, nine hundred eight thousand, eighty-six".