18828117 has 48 divisors (see below), whose sum is σ = 34369920. Its totient is φ = 9648000.

The previous prime is 18828097. The next prime is 18828127. The reversal of 18828117 is 71182881.

It is not a de Polignac number, because 18828117 - 2¹¹ = 18826069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18828127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69859 + ... + 70127.

It is an arithmetic number, because the mean of its divisors is an integer number (716040).

Almost surely, 2^18828117 is an apocalyptic number.

It is an amenable number.

18828117 is a deficient number, since it is larger than the sum of its proper divisors (15541803).

18828117 is a wasteful number, since it uses less digits than its factorization.

18828117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 391 counting only the distinct ones).

The product of its digits is 7168, while the sum is 36.

The square root of 18828117 is about 4339.1378175854. The cubic root of 18828117 is about 266.0330719993.

It can be divided in two parts, 1882 and 8117, that added together give a palindrome (9999).

The spelling of 18828117 in words is "eighteen million, eight hundred twenty-eight thousand, one hundred seventeen".