21082888 has 16 divisors (see below), whose sum is σ = 40032000. Its totient is φ = 10407696.

The previous prime is 21082879. The next prime is 21082903. The reversal of 21082888 is 88828012.

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, 16048 + ... + 17311.

It is an arithmetic number, because the mean of its divisors is an integer number (2502000).

Almost surely, 2^21082888 is an apocalyptic number.

It is an amenable number.

21082888 is a deficient number, since it is larger than the sum of its proper divisors (18949112).

21082888 is a wasteful number, since it uses less digits than its factorization.

21082888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33444 (or 33440 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 37.

The square root of 21082888 is about 4591.6106106681. The cubic root of 21082888 is about 276.2549279439.

The spelling of 21082888 in words is "twenty-one million, eighty-two thousand, eight hundred eighty-eight".