21068674 has 16 divisors (see below), whose sum is σ = 35665920. Its totient is φ = 9246160.

The previous prime is 21068669. The next prime is 21068717. The reversal of 21068674 is 47686012.

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 7 ways as a sum of consecutive naturals, for example, 15874 + ... + 17149.

It is an arithmetic number, because the mean of its divisors is an integer number (2229120).

Almost surely, 2^21068674 is an apocalyptic number.

21068674 is a deficient number, since it is larger than the sum of its proper divisors (14597246).

21068674 is a wasteful number, since it uses less digits than its factorization.

21068674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33065.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 21068674 is about 4590.0625268072. The cubic root of 21068674 is about 276.1928306586.

The spelling of 21068674 in words is "twenty-one million, sixty-eight thousand, six hundred seventy-four".