16921466 has 8 divisors (see below), whose sum is σ = 25438644. Its totient is φ = 8441920.

The previous prime is 16921447. The next prime is 16921493. The reversal of 16921466 is 66412961.

It can be written as a sum of positive squares in 2 ways, for example, as 14280841 + 2640625 = 3779^2 + 1625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8255 + ... + 10098.

Almost surely, 2^16921466 is an apocalyptic number.

16921466 is a deficient number, since it is larger than the sum of its proper divisors (8517178).

16921466 is a wasteful number, since it uses less digits than its factorization.

16921466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18816.

The product of its digits is 15552, while the sum is 35.

The square root of 16921466 is about 4113.5709547788. The cubic root of 16921466 is about 256.7316006696.

The spelling of 16921466 in words is "sixteen million, nine hundred twenty-one thousand, four hundred sixty-six".