16218339928 has 128 divisors (see below), whose sum is σ = 36162846720. Its totient is φ = 6675540480.

The previous prime is 16218339887. The next prime is 16218339989. The reversal of 16218339928 is 82993381261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55352550 + ... + 55352842.

It is an arithmetic number, because the mean of its divisors is an integer number (282522240).

Almost surely, 2^16218339928 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 16218339928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18081423360).

16218339928 is an abundant number, since it is smaller than the sum of its proper divisors (19944506792).

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

16218339928 is a wasteful number, since it uses less digits than its factorization.

16218339928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 653 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 52.

The spelling of 16218339928 in words is "sixteen billion, two hundred eighteen million, three hundred thirty-nine thousand, nine hundred twenty-eight".