16971918 has 16 divisors (see below), whose sum is σ = 34027776. Its totient is φ = 5643320.

The previous prime is 16971893. The next prime is 16971919. The reversal of 16971918 is 81917961.

It is a self number, because there is not a number n which added to its sum of digits gives 16971918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16971919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696 + ... + 5867.

It is an arithmetic number, because the mean of its divisors is an integer number (2126736).

Almost surely, 2^16971918 is an apocalyptic number.

16971918 is an abundant number, since it is smaller than the sum of its proper divisors (17055858).

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

16971918 is a wasteful number, since it uses less digits than its factorization.

16971918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999.

The product of its digits is 27216, while the sum is 42.

The square root of 16971918 is about 4119.6987753961. The cubic root of 16971918 is about 256.9864992126.

The spelling of 16971918 in words is "sixteen million, nine hundred seventy-one thousand, nine hundred eighteen".