18994384 has 20 divisors (see below), whose sum is σ = 37247616. Its totient is φ = 9382112.

The previous prime is 18994379. The next prime is 18994399. The reversal of 18994384 is 48349981.

18994384 = T₃₅₅₇ + T₃₅₅₈ + T₃₅₅₉.

It is a congruent number.

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, 5824 + ... + 8479.

Almost surely, 2^18994384 is an apocalyptic number.

18994384 is the 3559-th centered triangular number.

It is an amenable number.

18994384 is a deficient number, since it is larger than the sum of its proper divisors (18253232).

18994384 is a wasteful number, since it uses less digits than its factorization.

18994384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14394 (or 14388 counting only the distinct ones).

The product of its digits is 248832, while the sum is 46.

The square root of 18994384 is about 4358.2546965500. The cubic root of 18994384 is about 266.8138715031.

The spelling of 18994384 in words is "eighteen million, nine hundred ninety-four thousand, three hundred eighty-four".