16839393940 has 12 divisors (see below), whose sum is σ = 35362727316. Its totient is φ = 6735757568.

The previous prime is 16839393937. The next prime is 16839393971. The reversal of 16839393940 is 4939393861.

It can be written as a sum of positive squares in 2 ways, for example, as 11505136644 + 5334257296 = 107262^2 + 73036^2 .

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, 420984829 + ... + 420984868.

It is an arithmetic number, because the mean of its divisors is an integer number (2946893943).

Almost surely, 2^16839393940 is an apocalyptic number.

16839393940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16839393940 is an abundant number, since it is smaller than the sum of its proper divisors (18523333376).

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

16839393940 is a wasteful number, since it uses less digits than its factorization.

16839393940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841969706 (or 841969704 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 55.

The spelling of 16839393940 in words is "sixteen billion, eight hundred thirty-nine million, three hundred ninety-three thousand, nine hundred forty".