18430389208 has 192 divisors, whose sum is σ = 45686138400. Its totient is φ = 6886656000.

The previous prime is 18430389191. The next prime is 18430389209. The reversal of 18430389208 is 80298303481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18430389209) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10783458 + ... + 10785166.

Almost surely, 2^18430389208 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 18430389208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22843069200).

18430389208 is an abundant number, since it is smaller than the sum of its proper divisors (27255749192).

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

18430389208 is a wasteful number, since it uses less digits than its factorization.

18430389208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842 (or 1831 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 18430389208 in words is "eighteen billion, four hundred thirty million, three hundred eighty-nine thousand, two hundred eight".