18489168 has 80 divisors (see below), whose sum is σ = 53647360. Its totient is φ = 6096384.

The previous prime is 18489167. The next prime is 18489169. The reversal of 18489168 is 86198481.

18489168 is a `hidden beast` number, since 1 + 8 + 489 + 168 = 666.

It is an interprime number because it is at equal distance from previous prime (18489167) and next prime (18489169).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18489167) 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 15 ways as a sum of consecutive naturals, for example, 54696 + ... + 55032.

It is an arithmetic number, because the mean of its divisors is an integer number (670592).

Almost surely, 2^18489168 is an apocalyptic number.

18489168 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 18489168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26823680).

18489168 is an abundant number, since it is smaller than the sum of its proper divisors (35158192).

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

18489168 is a wasteful number, since it uses less digits than its factorization.

18489168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 469 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 18489168 is about 4299.9032547256. The cubic root of 18489168 is about 264.4269949542.

The spelling of 18489168 in words is "eighteen million, four hundred eighty-nine thousand, one hundred sixty-eight".