18400181822 has 8 divisors (see below), whose sum is σ = 30109388472. Its totient is φ = 8363719000.

The previous prime is 18400181809. The next prime is 18400181827. The reversal of 18400181822 is 22818100481.

It is a happy number.

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 (18400181827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418185929 + ... + 418185972.

It is an arithmetic number, because the mean of its divisors is an integer number (3763673559).

Almost surely, 2^18400181822 is an apocalyptic number.

18400181822 is a deficient number, since it is larger than the sum of its proper divisors (11709206650).

18400181822 is a wasteful number, since it uses less digits than its factorization.

18400181822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836371914.

The product of its (nonzero) digits is 8192, while the sum is 35.

The spelling of 18400181822 in words is "eighteen billion, four hundred million, one hundred eighty-one thousand, eight hundred twenty-two".