16421996 has 6 divisors (see below), whose sum is σ = 28738500. Its totient is φ = 8210996.

The previous prime is 16421963. The next prime is 16422019. The reversal of 16421996 is 69912461.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2052746 + ... + 2052753.

It is an arithmetic number, because the mean of its divisors is an integer number (4789750).

Almost surely, 2^16421996 is an apocalyptic number.

It is an amenable number.

16421996 is a deficient number, since it is larger than the sum of its proper divisors (12316504).

16421996 is a wasteful number, since it uses less digits than its factorization.

16421996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4105503 (or 4105501 counting only the distinct ones).

The product of its digits is 23328, while the sum is 38.

The square root of 16421996 is about 4052.4061987910. The cubic root of 16421996 is about 254.1803542690.

The spelling of 16421996 in words is "sixteen million, four hundred twenty-one thousand, nine hundred ninety-six".