21674466 has 40 divisors (see below), whose sum is σ = 52986384. Its totient is φ = 6567480.

The previous prime is 21674449. The next prime is 21674491. The reversal of 21674466 is 66447612.

It is a self number, because there is not a number n which added to its sum of digits gives 21674466.

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 in 19 ways as a sum of consecutive naturals, for example, 4300 + ... + 7863.

Almost surely, 2^21674466 is an apocalyptic number.

21674466 is an abundant number, since it is smaller than the sum of its proper divisors (31311918).

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

21674466 is a wasteful number, since it uses less digits than its factorization.

21674466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12188 (or 12179 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 21674466 is about 4655.5843886670. The cubic root of 21674466 is about 278.8150004931.

The spelling of 21674466 in words is "twenty-one million, six hundred seventy-four thousand, four hundred sixty-six".