20888828 has 12 divisors (see below), whose sum is σ = 38479560. Its totient is φ = 9894672.

The previous prime is 20888797. The next prime is 20888863. The reversal of 20888828 is 82888802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137351 + ... + 137502.

It is an arithmetic number, because the mean of its divisors is an integer number (3206630).

Almost surely, 2^20888828 is an apocalyptic number.

It is an amenable number.

20888828 is a deficient number, since it is larger than the sum of its proper divisors (17590732).

20888828 is a wasteful number, since it uses less digits than its factorization.

20888828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274876 (or 274874 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 44.

The square root of 20888828 is about 4570.4297390946. The cubic root of 20888828 is about 275.4047065965.

The spelling of 20888828 in words is "twenty million, eight hundred eighty-eight thousand, eight hundred twenty-eight".