21016708 has 12 divisors (see below), whose sum is σ = 37562112. Its totient is φ = 10284680.

The previous prime is 21016693. The next prime is 21016739. The reversal of 21016708 is 80761012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55708 + ... + 56083.

It is an arithmetic number, because the mean of its divisors is an integer number (3130176).

Almost surely, 2^21016708 is an apocalyptic number.

It is an amenable number.

21016708 is a deficient number, since it is larger than the sum of its proper divisors (16545404).

21016708 is a wasteful number, since it uses less digits than its factorization.

21016708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111842 (or 111840 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 21016708 is about 4584.3983247532. The cubic root of 21016708 is about 275.9655666628.

The spelling of 21016708 in words is "twenty-one million, sixteen thousand, seven hundred eight".