18698916 has 12 divisors (see below), whose sum is σ = 43630832. Its totient is φ = 6232968.

The previous prime is 18698909. The next prime is 18698923. The reversal of 18698916 is 61989681.

It is an interprime number because it is at equal distance from previous prime (18698909) and next prime (18698923).

It is a tau number, because it is divible by the number of its divisors (12).

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, 779110 + ... + 779133.

Almost surely, 2^18698916 is an apocalyptic number.

It is an amenable number.

18698916 is an abundant number, since it is smaller than the sum of its proper divisors (24931916).

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

18698916 is a wasteful number, since it uses less digits than its factorization.

18698916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558250 (or 1558248 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 18698916 is about 4324.2243235059. The cubic root of 18698916 is about 265.4231568537.

The spelling of 18698916 in words is "eighteen million, six hundred ninety-eight thousand, nine hundred sixteen".