16949678920 has 32 divisors (see below), whose sum is σ = 38227401720. Its totient is φ = 6763760640.

The previous prime is 16949678909. The next prime is 16949678927. The reversal of 16949678920 is 2987694961.

16949678920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10603644676 + 6346034244 = 102974^2 + 79662^2 .

It is not an unprimeable number, because it can be changed into a prime (16949678927) 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 7 ways as a sum of consecutive naturals, for example, 486417 + ... + 520096.

Almost surely, 2^16949678920 is an apocalyptic number.

16949678920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16949678920 is an abundant number, since it is smaller than the sum of its proper divisors (21277722800).

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

16949678920 is a wasteful number, since it uses less digits than its factorization.

16949678920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006945 (or 1006941 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 16949678920 in words is "sixteen billion, nine hundred forty-nine million, six hundred seventy-eight thousand, nine hundred twenty".