21696882 has 8 divisors (see below), whose sum is σ = 43393776. Its totient is φ = 7232292.

The previous prime is 21696877. The next prime is 21696923. The reversal of 21696882 is 28869612.

It is a sphenic number, since it is the product of 3 distinct primes.

21696882 is an admirable number.

It is an unprimeable number.

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, 1808068 + ... + 1808079.

It is an arithmetic number, because the mean of its divisors is an integer number (5424222).

Almost surely, 2^21696882 is an apocalyptic number.

21696882 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21696882 is a wasteful number, since it uses less digits than its factorization.

21696882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616152.

The product of its digits is 82944, while the sum is 42.

The square root of 21696882 is about 4657.9911979307. The cubic root of 21696882 is about 278.9110853472.

It can be divided in two parts, 21696 and 882, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 21696882 in words is "twenty-one million, six hundred ninety-six thousand, eight hundred eighty-two".