16931681304 has 24 divisors (see below), whose sum is σ = 42330796980. Its totient is φ = 5643681280.

The previous prime is 16931681303. The next prime is 16931681353. The reversal of 16931681304 is 40318613961.

16931681304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16931681303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 624184 + ... + 650744.

Almost surely, 2^16931681304 is an apocalyptic number.

It is an amenable number.

16931681304 is an abundant number, since it is smaller than the sum of its proper divisors (25399115676).

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

16931681304 is an frugal number, since it uses more digits than its factorization.

16931681304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53131 (or 26566 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 16931681304 in words is "sixteen billion, nine hundred thirty-one million, six hundred eighty-one thousand, three hundred four".