16921996 has 24 divisors (see below), whose sum is σ = 36448160. Its totient is φ = 6694272.

The previous prime is 16921981. The next prime is 16922023. The reversal of 16921996 is 69912961.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22881 + ... + 23608.

Almost surely, 2^16921996 is an apocalyptic number.

It is an amenable number.

16921996 is an abundant number, since it is smaller than the sum of its proper divisors (19526164).

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

16921996 is a wasteful number, since it uses less digits than its factorization.

16921996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46513 (or 46511 counting only the distinct ones).

The product of its digits is 52488, while the sum is 43.

The square root of 16921996 is about 4113.6353751882. The cubic root of 16921996 is about 256.7342810191.

The spelling of 16921996 in words is "sixteen million, nine hundred twenty-one thousand, nine hundred ninety-six".