11821894 has 8 divisors (see below), whose sum is σ = 20266128. Its totient is φ = 5066520.

The previous prime is 11821891. The next prime is 11821903. The reversal of 11821894 is 49812811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11821891) 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 3 ways as a sum of consecutive naturals, for example, 422197 + ... + 422224.

It is an arithmetic number, because the mean of its divisors is an integer number (2533266).

Almost surely, 2^11821894 is an apocalyptic number.

11821894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

11821894 is a deficient number, since it is larger than the sum of its proper divisors (8444234).

11821894 is an equidigital number, since it uses as much as digits as its factorization.

11821894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844430.

The product of its digits is 4608, while the sum is 34.

The square root of 11821894 is about 3438.2981255266. The cubic root of 11821894 is about 227.8045287814.

The spelling of 11821894 in words is "eleven million, eight hundred twenty-one thousand, eight hundred ninety-four".