18816039606 has 128 divisors (see below), whose sum is σ = 48903966720. Its totient is φ = 4686844032.

The previous prime is 18816039581. The next prime is 18816039623. The reversal of 18816039606 is 60693061881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3597165 + ... + 3602391.

It is an arithmetic number, because the mean of its divisors is an integer number (382062240).

Almost surely, 2^18816039606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18816039606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24451983360).

18816039606 is an abundant number, since it is smaller than the sum of its proper divisors (30087927114).

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

18816039606 is a wasteful number, since it uses less digits than its factorization.

18816039606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5618.

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 18816039606 in words is "eighteen billion, eight hundred sixteen million, thirty-nine thousand, six hundred six".