18994176 has 110 divisors (see below), whose sum is σ = 56968010. Its totient is φ = 6303744.

The previous prime is 18994169. The next prime is 18994181. The reversal of 18994176 is 67149981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18662400 + 331776 = 4320^2 + 576^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 82830 + ... + 83058.

It is an arithmetic number, because the mean of its divisors is an integer number (517891).

Almost surely, 2^18994176 is an apocalyptic number.

18994176 is a gapful number since it is divisible by the number (16) 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 18994176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28484005).

18994176 is an abundant number, since it is smaller than the sum of its proper divisors (37973834).

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

18994176 is an equidigital number, since it uses as much as digits as its factorization.

18994176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 234 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 18994176 is about 4358.2308337214. The cubic root of 18994176 is about 266.8128975751.

The spelling of 18994176 in words is "eighteen million, nine hundred ninety-four thousand, one hundred seventy-six".