181814 has 4 divisors (see below), whose sum is σ = 272724. Its totient is φ = 90906.

The previous prime is 181813. The next prime is 181837. The reversal of 181814 is 418181.

181814 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 181814.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 181814.

It is not an unprimeable number, because it can be changed into a prime (181813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45452 + ... + 45455.

It is an arithmetic number, because the mean of its divisors is an integer number (68181).

2¹⁸¹⁸¹⁴ is an apocalyptic number.

181814 is a deficient number, since it is larger than the sum of its proper divisors (90910).

181814 is an equidigital number, since it uses as much as digits as its factorization.

181814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90909.

The product of its digits is 256, while the sum is 23.

The square root of 181814 is about 426.3965290665. The cubic root of 181814 is about 56.6511991618.

Adding to 181814 its reverse (418181), we get a palindrome (599995).

It can be divided in two parts, 1818 and 14, that multiplied together give a palindrome (25452).

The spelling of 181814 in words is "one hundred eighty-one thousand, eight hundred fourteen".