18810421822 has 4 divisors (see below), whose sum is σ = 28215632736. Its totient is φ = 9405210910.

The previous prime is 18810421789. The next prime is 18810421829. The reversal of 18810421822 is 22812401881.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18810421829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4702605454 + ... + 4702605457.

It is an arithmetic number, because the mean of its divisors is an integer number (7053908184).

Almost surely, 2^18810421822 is an apocalyptic number.

18810421822 is a deficient number, since it is larger than the sum of its proper divisors (9405210914).

18810421822 is an equidigital number, since it uses as much as digits as its factorization.

18810421822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9405210913.

The product of its (nonzero) digits is 16384, while the sum is 37.

The spelling of 18810421822 in words is "eighteen billion, eight hundred ten million, four hundred twenty-one thousand, eight hundred twenty-two".