16838739920 has 20 divisors (see below), whose sum is σ = 39150070500. Its totient is φ = 6735495936.

The previous prime is 16838739913. The next prime is 16838739941. The reversal of 16838739920 is 2993783861.

It can be written as a sum of positive squares in 2 ways, for example, as 2951531584 + 13887208336 = 54328^2 + 117844^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105242045 + ... + 105242204.

It is an arithmetic number, because the mean of its divisors is an integer number (1957503525).

Almost surely, 2^16838739920 is an apocalyptic number.

16838739920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16838739920 is an abundant number, since it is smaller than the sum of its proper divisors (22311330580).

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

16838739920 is a wasteful number, since it uses less digits than its factorization.

16838739920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210484262 (or 210484256 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 16838739920 in words is "sixteen billion, eight hundred thirty-eight million, seven hundred thirty-nine thousand, nine hundred twenty".