20973828 has 24 divisors (see below), whose sum is σ = 49226688. Its totient is φ = 6950176.

The previous prime is 20973803. The next prime is 20973833. The reversal of 20973828 is 82837902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2976 + ... + 7127.

It is an arithmetic number, because the mean of its divisors is an integer number (2051112).

Almost surely, 2^20973828 is an apocalyptic number.

It is an amenable number.

20973828 is an abundant number, since it is smaller than the sum of its proper divisors (28252860).

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

20973828 is a wasteful number, since it uses less digits than its factorization.

20973828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10283 (or 10281 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 20973828 is about 4579.7192053662. The cubic root of 20973828 is about 275.7777563984. Note that the first 4 decimals are identical.

The spelling of 20973828 in words is "twenty million, nine hundred seventy-three thousand, eight hundred twenty-eight".