16921685288 has 16 divisors (see below), whose sum is σ = 31758079860. Its totient is φ = 8452864000.

The previous prime is 16921685273. The next prime is 16921685299. The reversal of 16921685288 is 88258612961.

16921685288 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 2 ways, for example, as 16832986564 + 88698724 = 129742^2 + 9418^2 .

It is a super-2 number, since 2×16921685288² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 988313 + ... + 1005288.

Almost surely, 2^16921685288 is an apocalyptic number.

It is an amenable number.

16921685288 is a deficient number, since it is larger than the sum of its proper divisors (14836394572).

16921685288 is a wasteful number, since it uses less digits than its factorization.

16921685288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994668 (or 1994664 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 56.

The spelling of 16921685288 in words is "sixteen billion, nine hundred twenty-one million, six hundred eighty-five thousand, two hundred eighty-eight".