18680193 has 16 divisors (see below), whose sum is σ = 31628160. Its totient is φ = 10674288.

The previous prime is 18680177. The next prime is 18680201. The reversal of 18680193 is 39108681.

It is not a de Polignac number, because 18680193 - 2⁴ = 18680177 is a prime.

It is a super-2 number, since 2×18680193² = 697899221034498, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18680113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49230 + ... + 49607.

It is an arithmetic number, because the mean of its divisors is an integer number (1976760).

Almost surely, 2^18680193 is an apocalyptic number.

It is an amenable number.

18680193 is a deficient number, since it is larger than the sum of its proper divisors (12947967).

18680193 is an equidigital number, since it uses as much as digits as its factorization.

18680193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98853 (or 98847 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18680193 is about 4322.0588843744. The cubic root of 18680193 is about 265.3345389301.

The spelling of 18680193 in words is "eighteen million, six hundred eighty thousand, one hundred ninety-three".