18684936 has 48 divisors (see below), whose sum is σ = 50996400. Its totient is φ = 6180192.

The previous prime is 18684917. The next prime is 18684943. The reversal of 18684936 is 63948681.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 18684891 and 18684900.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9075 + ... + 10941.

It is an arithmetic number, because the mean of its divisors is an integer number (1062425).

Almost surely, 2^18684936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18684936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25498200).

18684936 is an abundant number, since it is smaller than the sum of its proper divisors (32311464).

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

18684936 is a wasteful number, since it uses less digits than its factorization.

18684936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018 (or 2011 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 18684936 is about 4322.6075463775. The cubic root of 18684936 is about 265.3569936450.

The spelling of 18684936 in words is "eighteen million, six hundred eighty-four thousand, nine hundred thirty-six".