18347812226508 has 24 divisors (see below), whose sum is σ = 42811692604912. Its totient is φ = 6115918731264.

The previous prime is 18347812226507. The next prime is 18347812226551. The reversal of 18347812226508 is 80562221874381.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18347812226507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2094516 + ... + 6409572.

Almost surely, 2^{18347812226508} is an apocalyptic number.

It is an amenable number.

18347812226508 is an abundant number, since it is smaller than the sum of its proper divisors (24463880378404).

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

18347812226508 is a wasteful number, since it uses less digits than its factorization.

18347812226508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4669401 (or 4669399 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 57.

The spelling of 18347812226508 in words is "eighteen trillion, three hundred forty-seven billion, eight hundred twelve million, two hundred twenty-six thousand, five hundred eight".