18990794 has 8 divisors (see below), whose sum is σ = 28573248. Its totient is φ = 9466380.

The previous prime is 18990793. The next prime is 18990809. The reversal of 18990794 is 49709981.

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

It is not an unprimeable number, because it can be changed into a prime (18990793) 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 3 ways as a sum of consecutive naturals, for example, 13682 + ... + 15005.

It is an arithmetic number, because the mean of its divisors is an integer number (3571656).

Almost surely, 2^18990794 is an apocalyptic number.

18990794 is a deficient number, since it is larger than the sum of its proper divisors (9582454).

18990794 is a wasteful number, since it uses less digits than its factorization.

18990794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29020.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 18990794 is about 4357.8428149716. The cubic root of 18990794 is about 266.7970608824.

The spelling of 18990794 in words is "eighteen million, nine hundred ninety thousand, seven hundred ninety-four".