21170608 has 20 divisors (see below), whose sum is σ = 41481720. Its totient is φ = 10465664.

The previous prime is 21170587. The next prime is 21170629. The reversal of 21170608 is 80607112.

It is an interprime number because it is at equal distance from previous prime (21170587) and next prime (21170629).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6010 + ... + 8857.

It is an arithmetic number, because the mean of its divisors is an integer number (2074086).

Almost surely, 2^21170608 is an apocalyptic number.

It is an amenable number.

21170608 is a deficient number, since it is larger than the sum of its proper divisors (20311112).

21170608 is a wasteful number, since it uses less digits than its factorization.

21170608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14964 (or 14958 counting only the distinct ones).

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

The square root of 21170608 is about 4601.1528990026. The cubic root of 21170608 is about 276.6375376181.

The spelling of 21170608 in words is "twenty-one million, one hundred seventy thousand, six hundred eight".