18855409226 has 8 divisors (see below), whose sum is σ = 28286059620. Its totient is φ = 9426722688.

The previous prime is 18855409163. The next prime is 18855409229. The reversal of 18855409226 is 62290455881.

It is a happy number.

It is a Cunningham number, because it is equal to 137315²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 18855409225 + 1 = 137315^2 + 1^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18855409229) 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, 466721 + ... + 505508.

Almost surely, 2^18855409226 is an apocalyptic number.

18855409226 is a deficient number, since it is larger than the sum of its proper divisors (9430650394).

18855409226 is an equidigital number, since it uses as much as digits as its factorization.

18855409226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981928.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The spelling of 18855409226 in words is "eighteen billion, eight hundred fifty-five million, four hundred nine thousand, two hundred twenty-six".