18481686 has 16 divisors (see below), whose sum is σ = 39137904. Its totient is φ = 5798144.

The previous prime is 18481667. The next prime is 18481709. The reversal of 18481686 is 68618481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90495 + ... + 90698.

It is an arithmetic number, because the mean of its divisors is an integer number (2446119).

Almost surely, 2^18481686 is an apocalyptic number.

18481686 is an abundant number, since it is smaller than the sum of its proper divisors (20656218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18481686 is a wasteful number, since it uses less digits than its factorization.

18481686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181215.

The product of its digits is 73728, while the sum is 42.

The square root of 18481686 is about 4299.0331471158. The cubic root of 18481686 is about 264.3913216399.

The spelling of 18481686 in words is "eighteen million, four hundred eighty-one thousand, six hundred eighty-six".