21065676 has 24 divisors (see below), whose sum is σ = 49304640. Its totient is φ = 7000272.

The previous prime is 21065641. The next prime is 21065701. The reversal of 21065676 is 67656012.

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 7 ways as a sum of consecutive naturals, for example, 1635 + ... + 6693.

It is an arithmetic number, because the mean of its divisors is an integer number (2054360).

Almost surely, 2^21065676 is an apocalyptic number.

It is an amenable number.

21065676 is an abundant number, since it is smaller than the sum of its proper divisors (28238964).

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

21065676 is a wasteful number, since it uses less digits than its factorization.

21065676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5413 (or 5411 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 21065676 is about 4589.7359401168. The cubic root of 21065676 is about 276.1797296066.

The spelling of 21065676 in words is "twenty-one million, sixty-five thousand, six hundred seventy-six".