18299916 has 18 divisors (see below), whose sum is σ = 46258212. Its totient is φ = 6099960.

The previous prime is 18299903. The next prime is 18299947. The reversal of 18299916 is 61999281.

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 254130 + ... + 254201.

Almost surely, 2^18299916 is an apocalyptic number.

It is an amenable number.

18299916 is an abundant number, since it is smaller than the sum of its proper divisors (27958296).

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

18299916 is a wasteful number, since it uses less digits than its factorization.

18299916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508341 (or 508336 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 18299916 is about 4277.8401092140. The cubic root of 18299916 is about 263.5216890236.

The spelling of 18299916 in words is "eighteen million, two hundred ninety-nine thousand, nine hundred sixteen".