16691964 has 24 divisors (see below), whose sum is σ = 39419520. Its totient is φ = 5496624.

The previous prime is 16691963. The next prime is 16692019. The reversal of 16691964 is 46919661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16691963) 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, 7384 + ... + 9375.

It is an arithmetic number, because the mean of its divisors is an integer number (1642480).

Almost surely, 2^16691964 is an apocalyptic number.

It is an amenable number.

16691964 is an abundant number, since it is smaller than the sum of its proper divisors (22727556).

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

16691964 is a wasteful number, since it uses less digits than its factorization.

16691964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16849 (or 16847 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 16691964 is about 4085.5800077835. The cubic root of 16691964 is about 255.5656493668.

The spelling of 16691964 in words is "sixteen million, six hundred ninety-one thousand, nine hundred sixty-four".