18830993 has 8 divisors (see below), whose sum is σ = 19152000. Its totient is φ = 18512208.

The previous prime is 18830989. The next prime is 18831011. The reversal of 18830993 is 39903881.

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 18830993 - 2² = 18830989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18830993.

It is not an unprimeable number, because it can be changed into a prime (18830983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27230 + ... + 27912.

It is an arithmetic number, because the mean of its divisors is an integer number (2394000).

Almost surely, 2^18830993 is an apocalyptic number.

It is an amenable number.

18830993 is a deficient number, since it is larger than the sum of its proper divisors (321007).

18830993 is an equidigital number, since it uses as much as digits as its factorization.

18830993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 18830993 is about 4339.4692071727. The cubic root of 18830993 is about 266.0466168511.

The spelling of 18830993 in words is "eighteen million, eight hundred thirty thousand, nine hundred ninety-three".