20356633640536 has 32 divisors (see below), whose sum is σ = 38363126091840. Its totient is φ = 10126468538368.

The previous prime is 20356633640531. The next prime is 20356633640537. The reversal of 20356633640536 is 63504633665302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20356633640531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146913240 + ... + 147051736.

It is an arithmetic number, because the mean of its divisors is an integer number (1198847690370).

Almost surely, 2^{20356633640536} is an apocalyptic number.

It is an amenable number.

20356633640536 is a deficient number, since it is larger than the sum of its proper divisors (18006492451304).

20356633640536 is a wasteful number, since it uses less digits than its factorization.

20356633640536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231963 (or 231959 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 52.

The spelling of 20356633640536 in words is "twenty trillion, three hundred fifty-six billion, six hundred thirty-three million, six hundred forty thousand, five hundred thirty-six".