20856527936 has 14 divisors (see below), whose sum is σ = 41387172750. Its totient is φ = 10428263936.

The previous prime is 20856527921. The next prime is 20856527969. The reversal of 20856527936 is 63972565802.

It can be written as a sum of positive squares in only one way, i.e., 20141286400 + 715241536 = 141920^2 + 26744^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162941561 + ... + 162941688.

It is an arithmetic number, because the mean of its divisors is an integer number (2956226625).

Almost surely, 2^20856527936 is an apocalyptic number.

It is an amenable number.

20856527936 is a deficient number, since it is larger than the sum of its proper divisors (20530644814).

20856527936 is an equidigital number, since it uses as much as digits as its factorization.

20856527936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325883261 (or 325883251 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 20856527936 in words is "twenty billion, eight hundred fifty-six million, five hundred twenty-seven thousand, nine hundred thirty-six".