21676008 has 32 divisors (see below), whose sum is σ = 54754560. Its totient is φ = 7150080.

The previous prime is 21676007. The next prime is 21676033. The reversal of 21676008 is 80067612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21676007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2328 + ... + 6983.

It is an arithmetic number, because the mean of its divisors is an integer number (1711080).

Almost surely, 2^21676008 is an apocalyptic number.

It is an amenable number.

21676008 is an abundant number, since it is smaller than the sum of its proper divisors (33078552).

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

21676008 is a wasteful number, since it uses less digits than its factorization.

21676008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9417 (or 9413 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 21676008 is about 4655.7499932879. The cubic root of 21676008 is about 278.8216123059.

The spelling of 21676008 in words is "twenty-one million, six hundred seventy-six thousand, eight".