18180336 has 20 divisors (see below), whose sum is σ = 46965992. Its totient is φ = 6060096.

The previous prime is 18180313. The next prime is 18180347. The reversal of 18180336 is 63308181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189331 + ... + 189426.

Almost surely, 2^18180336 is an apocalyptic number.

18180336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18180336 is an abundant number, since it is smaller than the sum of its proper divisors (28785656).

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

18180336 is a wasteful number, since it uses less digits than its factorization.

18180336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378768 (or 378762 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18180336 is about 4263.8405223460. The cubic root of 18180336 is about 262.9464439132.

The spelling of 18180336 in words is "eighteen million, one hundred eighty thousand, three hundred thirty-six".