21682976 has 24 divisors (see below), whose sum is σ = 48787200. Its totient is φ = 9292608.

The previous prime is 21682967. The next prime is 21682979. The reversal of 21682976 is 67928612.

It is not an unprimeable number, because it can be changed into a prime (21682979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48176 + ... + 48623.

It is an arithmetic number, because the mean of its divisors is an integer number (2032800).

Almost surely, 2^21682976 is an apocalyptic number.

It is an amenable number.

21682976 is an abundant number, since it is smaller than the sum of its proper divisors (27104224).

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

21682976 is an equidigital number, since it uses as much as digits as its factorization.

21682976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96816 (or 96808 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 21682976 is about 4656.4982551269. The cubic root of 21682976 is about 278.8514859009.

The spelling of 21682976 in words is "twenty-one million, six hundred eighty-two thousand, nine hundred seventy-six".