18732168 has 128 divisors (see below), whose sum is σ = 64108800. Its totient is φ = 4935168.

The previous prime is 18732163. The next prime is 18732199. The reversal of 18732168 is 86123781.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is not an unprimeable number, because it can be changed into a prime (18732163) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 19180 + ... + 20132.

It is an arithmetic number, because the mean of its divisors is an integer number (500850).

Almost surely, 2^18732168 is an apocalyptic number.

18732168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18732168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32054400).

18732168 is an abundant number, since it is smaller than the sum of its proper divisors (45376632).

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

18732168 is a wasteful number, since it uses less digits than its factorization.

18732168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988 (or 978 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 18732168 is about 4328.0674671266. The cubic root of 18732168 is about 265.5803963491.

The spelling of 18732168 in words is "eighteen million, seven hundred thirty-two thousand, one hundred sixty-eight".