20789956 has 24 divisors (see below), whose sum is σ = 40199040. Its totient is φ = 9328800.

The previous prime is 20789927. The next prime is 20790017. The reversal of 20789956 is 65998702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486 + ... + 6466.

It is an arithmetic number, because the mean of its divisors is an integer number (1674960).

Almost surely, 2^20789956 is an apocalyptic number.

It is an amenable number.

20789956 is a deficient number, since it is larger than the sum of its proper divisors (19409084).

20789956 is a wasteful number, since it uses less digits than its factorization.

20789956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6075 (or 6073 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 20789956 is about 4559.6004210895. The cubic root of 20789956 is about 274.9694996476.

The spelling of 20789956 in words is "twenty million, seven hundred eighty-nine thousand, nine hundred fifty-six".