18994874 has 8 divisors (see below), whose sum is σ = 28511508. Its totient is φ = 9491040.

The previous prime is 18994861. The next prime is 18994883. The reversal of 18994874 is 47849981.

It can be written as a sum of positive squares in 2 ways, for example, as 18861649 + 133225 = 4343^2 + 365^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2654 + ... + 6710.

Almost surely, 2^18994874 is an apocalyptic number.

18994874 is a deficient number, since it is larger than the sum of its proper divisors (9516634).

18994874 is a wasteful number, since it uses less digits than its factorization.

18994874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400.

The product of its digits is 580608, while the sum is 50.

The square root of 18994874 is about 4358.3109113509. The cubic root of 18994874 is about 266.8161658246.

The spelling of 18994874 in words is "eighteen million, nine hundred ninety-four thousand, eight hundred seventy-four".