21064714 has 16 divisors (see below), whose sum is σ = 34828416. Its totient is φ = 9475200.

The previous prime is 21064679. The next prime is 21064723. The reversal of 21064714 is 41746012.

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, 2802 + ... + 7069.

It is an arithmetic number, because the mean of its divisors is an integer number (2176776).

Almost surely, 2^21064714 is an apocalyptic number.

21064714 is a deficient number, since it is larger than the sum of its proper divisors (13763702).

21064714 is a wasteful number, since it uses less digits than its factorization.

21064714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9981.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 21064714 is about 4589.6311398630. The cubic root of 21064714 is about 276.1755254699.

The spelling of 21064714 in words is "twenty-one million, sixty-four thousand, seven hundred fourteen".