18004994 has 8 divisors (see below), whose sum is σ = 30865728. Its totient is φ = 7716420.

The previous prime is 18004991. The next prime is 18004999. The reversal of 18004994 is 49940081.

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 (18004991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643022 + ... + 643049.

It is an arithmetic number, because the mean of its divisors is an integer number (3858216).

Almost surely, 2^18004994 is an apocalyptic number.

18004994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18004994 is a deficient number, since it is larger than the sum of its proper divisors (12860734).

18004994 is a wasteful number, since it uses less digits than its factorization.

18004994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286080.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 18004994 is about 4243.2291948468. The cubic root of 18004994 is about 262.0983741844.

The spelling of 18004994 in words is "eighteen million, four thousand, nine hundred ninety-four".