18973193 has 8 divisors (see below), whose sum is σ = 19735680. Its totient is φ = 18223920.

The previous prime is 18973189. The next prime is 18973217. The reversal of 18973193 is 39137981.

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 18973193 - 2² = 18973189 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 18973193.

It is not an unprimeable number, because it can be changed into a prime (18973093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323 + ... + 6168.

It is an arithmetic number, because the mean of its divisors is an integer number (2466960).

Almost surely, 2^18973193 is an apocalyptic number.

It is an amenable number.

18973193 is a deficient number, since it is larger than the sum of its proper divisors (762487).

18973193 is an equidigital number, since it uses as much as digits as its factorization.

18973193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6607.

The product of its digits is 40824, while the sum is 41.

The square root of 18973193 is about 4355.8228843698. The cubic root of 18973193 is about 266.7146113447.

The spelling of 18973193 in words is "eighteen million, nine hundred seventy-three thousand, one hundred ninety-three".