18468409908 has 72 divisors (see below), whose sum is σ = 46693741248. Its totient is φ = 5678819328.

The previous prime is 18468409907. The next prime is 18468409919. The reversal of 18468409908 is 80990486481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18468409907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5885716 + ... + 5888852.

It is an arithmetic number, because the mean of its divisors is an integer number (648524184).

Almost surely, 2^18468409908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18468409908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23346870624).

18468409908 is an abundant number, since it is smaller than the sum of its proper divisors (28225331340).

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

18468409908 is a wasteful number, since it uses less digits than its factorization.

18468409908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6073 (or 6058 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 57.

The spelling of 18468409908 in words is "eighteen billion, four hundred sixty-eight million, four hundred nine thousand, nine hundred eight".