17994213 has 12 divisors (see below), whose sum is σ = 26054028. Its totient is φ = 11967360.

The previous prime is 17994209. The next prime is 17994259. The reversal of 17994213 is 31249971.

It can be written as a sum of positive squares in 2 ways, for example, as 2169729 + 15824484 = 1473^2 + 3978^2 .

It is not a de Polignac number, because 17994213 - 2² = 17994209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17994293) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1981 + ... + 6317.

It is an arithmetic number, because the mean of its divisors is an integer number (2171169).

Almost surely, 2^17994213 is an apocalyptic number.

It is an amenable number.

17994213 is a deficient number, since it is larger than the sum of its proper divisors (8059815).

17994213 is a wasteful number, since it uses less digits than its factorization.

17994213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4804 (or 4801 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 17994213 is about 4241.9586278039. The cubic root of 17994213 is about 262.0460507986.

The spelling of 17994213 in words is "seventeen million, nine hundred ninety-four thousand, two hundred thirteen".