18994359 has 8 divisors (see below), whose sum is σ = 25421040. Its totient is φ = 12615296.

The previous prime is 18994337. The next prime is 18994361. The reversal of 18994359 is 95349981.

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 18994359 - 2¹⁶ = 18928823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18994309) 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, 10962 + ... + 12575.

It is an arithmetic number, because the mean of its divisors is an integer number (3177630).

Almost surely, 2^18994359 is an apocalyptic number.

18994359 is a deficient number, since it is larger than the sum of its proper divisors (6426681).

18994359 is a wasteful number, since it uses less digits than its factorization.

18994359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23809.

The product of its digits is 349920, while the sum is 48.

The square root of 18994359 is about 4358.2518284285. The cubic root of 18994359 is about 266.8137544448.

The spelling of 18994359 in words is "eighteen million, nine hundred ninety-four thousand, three hundred fifty-nine".