16681908 has 12 divisors (see below), whose sum is σ = 38924480. Its totient is φ = 5560632.

The previous prime is 16681901. The next prime is 16681919. The reversal of 16681908 is 80918661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695068 + ... + 695091.

Almost surely, 2^16681908 is an apocalyptic number.

It is an amenable number.

16681908 is an abundant number, since it is smaller than the sum of its proper divisors (22242572).

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

16681908 is a wasteful number, since it uses less digits than its factorization.

16681908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390166 (or 1390164 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 16681908 is about 4084.3491525578. The cubic root of 16681908 is about 255.5143175916.

The spelling of 16681908 in words is "sixteen million, six hundred eighty-one thousand, nine hundred eight".