18680855 has 8 divisors (see below), whose sum is σ = 22894272. Its totient is φ = 14626528.

The previous prime is 18680803. The next prime is 18680861. The reversal of 18680855 is 55808681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18680855 - 2²² = 14486551 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 39512 + ... + 39981.

It is an arithmetic number, because the mean of its divisors is an integer number (2861784).

Almost surely, 2^18680855 is an apocalyptic number.

18680855 is a deficient number, since it is larger than the sum of its proper divisors (4213417).

18680855 is an equidigital number, since it uses as much as digits as its factorization.

18680855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79545.

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 18680855 is about 4322.1354675669. The cubic root of 18680855 is about 265.3376732552.

The spelling of 18680855 in words is "eighteen million, six hundred eighty thousand, eight hundred fifty-five".