18168803 has 4 divisors (see below), whose sum is σ = 18301560. Its totient is φ = 18036048.

The previous prime is 18168793. The next prime is 18168811. The reversal of 18168803 is 30886181.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18168803 - 2²⁰ = 17120227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18168823) 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, 66173 + ... + 66446.

It is an arithmetic number, because the mean of its divisors is an integer number (4575390).

Almost surely, 2^18168803 is an apocalyptic number.

18168803 is a deficient number, since it is larger than the sum of its proper divisors (132757).

18168803 is a wasteful number, since it uses less digits than its factorization.

18168803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132756.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 18168803 is about 4262.4878885458. The cubic root of 18168803 is about 262.8908306613.

The spelling of 18168803 in words is "eighteen million, one hundred sixty-eight thousand, eight hundred three".