18117056 has 14 divisors (see below), whose sum is σ = 35951160. Its totient is φ = 9058496.

The previous prime is 18117041. The next prime is 18117101. The reversal of 18117056 is 65071181.

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, 141476 + ... + 141603.

It is an arithmetic number, because the mean of its divisors is an integer number (2567940).

Almost surely, 2^18117056 is an apocalyptic number.

18117056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18117056 is a deficient number, since it is larger than the sum of its proper divisors (17834104).

18117056 is an equidigital number, since it uses as much as digits as its factorization.

18117056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283091 (or 283081 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 18117056 is about 4256.4135137461. The cubic root of 18117056 is about 262.6410114630.

The spelling of 18117056 in words is "eighteen million, one hundred seventeen thousand, fifty-six".