18059994 has 24 divisors (see below), whose sum is σ = 41190240. Its totient is φ = 5703048.

The previous prime is 18059983. The next prime is 18060017. The reversal of 18059994 is 49995081.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26062 + ... + 26745.

It is an arithmetic number, because the mean of its divisors is an integer number (1716260).

Almost surely, 2^18059994 is an apocalyptic number.

18059994 is an abundant number, since it is smaller than the sum of its proper divisors (23130246).

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

18059994 is a wasteful number, since it uses less digits than its factorization.

18059994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52834 (or 52831 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 18059994 is about 4249.7051662439. The cubic root of 18059994 is about 262.3649809038.

The spelling of 18059994 in words is "eighteen million, fifty-nine thousand, nine hundred ninety-four".