20512116536 has 32 divisors (see below), whose sum is σ = 39640412880. Its totient is φ = 9943315200.

The previous prime is 20512116533. The next prime is 20512116571. The reversal of 20512116536 is 63561121502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512116533) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 40130 + ... + 206481.

Almost surely, 2^20512116536 is an apocalyptic number.

It is an amenable number.

20512116536 is a deficient number, since it is larger than the sum of its proper divisors (19128296344).

20512116536 is a wasteful number, since it uses less digits than its factorization.

20512116536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246935 (or 246931 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 20512116536 in words is "twenty billion, five hundred twelve million, one hundred sixteen thousand, five hundred thirty-six".