18873394 has 8 divisors (see below), whose sum is σ = 28517148. Its totient is φ = 9367680.

The previous prime is 18873331. The next prime is 18873419. The reversal of 18873394 is 49337881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17015625 + 1857769 = 4125^2 + 1363^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 18873394.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34167 + ... + 34714.

Almost surely, 2^18873394 is an apocalyptic number.

18873394 is a deficient number, since it is larger than the sum of its proper divisors (9643754).

18873394 is a wasteful number, since it uses less digits than its factorization.

18873394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69020.

The product of its digits is 145152, while the sum is 43.

The square root of 18873394 is about 4344.3519654835. The cubic root of 18873394 is about 266.2461493709.

The spelling of 18873394 in words is "eighteen million, eight hundred seventy-three thousand, three hundred ninety-four".