17999994 has 8 divisors (see below), whose sum is σ = 36000000. Its totient is φ = 5999996.

The previous prime is 17999987. The next prime is 18000041. The reversal of 17999994 is 49999971.

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

17999994 is an admirable number.

It is an unprimeable number.

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, 1499994 + ... + 1500005.

It is an arithmetic number, because the mean of its divisors is an integer number (4500000).

Almost surely, 2^17999994 is an apocalyptic number.

17999994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17999994 is a wasteful number, since it uses less digits than its factorization.

17999994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000004.

The product of its digits is 1653372, while the sum is 57.

The square root of 17999994 is about 4242.6399800124. The cubic root of 17999994 is about 262.0741103015.

The spelling of 17999994 in words is "seventeen million, nine hundred ninety-nine thousand, nine hundred ninety-four".