18226313808 has 20 divisors (see below), whose sum is σ = 47084644128. Its totient is φ = 6075437920.

The previous prime is 18226313783. The next prime is 18226313839. The reversal of 18226313808 is 80831362281.

It is a self number, because there is not a number n which added to its sum of digits gives 18226313808.

It is a congruent number.

It is an unprimeable number.

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, 189857388 + ... + 189857483.

Almost surely, 2^18226313808 is an apocalyptic number.

It is an amenable number.

18226313808 is an abundant number, since it is smaller than the sum of its proper divisors (28858330320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18226313808 is a wasteful number, since it uses less digits than its factorization.

18226313808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379714882 (or 379714876 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 18226313808 in words is "eighteen billion, two hundred twenty-six million, three hundred thirteen thousand, eight hundred eight".