20856112532 has 6 divisors (see below), whose sum is σ = 36498196938. Its totient is φ = 10428056264.

The previous prime is 20856112507. The next prime is 20856112561. The reversal of 20856112532 is 23521165802.

It can be written as a sum of positive squares in only one way, i.e., 12695880976 + 8160231556 = 112676^2 + 90334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20856112492 and 20856112501.

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 as a sum of consecutive naturals, namely, 2607014063 + ... + 2607014070.

It is an arithmetic number, because the mean of its divisors is an integer number (6083032823).

Almost surely, 2^20856112532 is an apocalyptic number.

It is an amenable number.

20856112532 is a deficient number, since it is larger than the sum of its proper divisors (15642084406).

20856112532 is a wasteful number, since it uses less digits than its factorization.

20856112532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5214028137 (or 5214028135 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 20856112532 in words is "twenty billion, eight hundred fifty-six million, one hundred twelve thousand, five hundred thirty-two".