18818873 has 8 divisors (see below), whose sum is σ = 20015520. Its totient is φ = 17642880.

The previous prime is 18818867. The next prime is 18818909. The reversal of 18818873 is 37881881.

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

It is a cyclic number.

It is not a de Polignac number, because 18818873 - 2⁴ = 18818857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18818573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3263 + ... + 6948.

It is an arithmetic number, because the mean of its divisors is an integer number (2501940).

Almost surely, 2^18818873 is an apocalyptic number.

It is an amenable number.

18818873 is a deficient number, since it is larger than the sum of its proper divisors (1196647).

18818873 is a wasteful number, since it uses less digits than its factorization.

18818873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10327.

The product of its digits is 86016, while the sum is 44.

The square root of 18818873 is about 4338.0724982416. The cubic root of 18818873 is about 265.9895269776.

It can be divided in two parts, 18818 and 873, that added together give a palindrome (19691).

The spelling of 18818873 in words is "eighteen million, eight hundred eighteen thousand, eight hundred seventy-three".