16689042 has 24 divisors (see below), whose sum is σ = 36930816. Its totient is φ = 5444376.

The previous prime is 16688999. The next prime is 16689061. The reversal of 16689042 is 24098661.

It is a junction number, because it is equal to n+sod(n) for n = 16688988 and 16689006.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9018 + ... + 10709.

It is an arithmetic number, because the mean of its divisors is an integer number (1538784).

Almost surely, 2^16689042 is an apocalyptic number.

16689042 is an abundant number, since it is smaller than the sum of its proper divisors (20241774).

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

16689042 is a wasteful number, since it uses less digits than its factorization.

16689042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19782 (or 19779 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 16689042 is about 4085.2223929671. Note that the first 3 decimals coincide. The cubic root of 16689042 is about 255.5507358749.

The spelling of 16689042 in words is "sixteen million, six hundred eighty-nine thousand, forty-two".