20507136612736 has 32 divisors (see below), whose sum is σ = 40878628128000. Its totient is φ = 10247402494464.

The previous prime is 20507136612653. The next prime is 20507136612973. The reversal of 20507136612736 is 63721663170502.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 20507136612736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47956711 + ... + 48382438.

It is an arithmetic number, because the mean of its divisors is an integer number (1277457129000).

Almost surely, 2^{20507136612736} is an apocalyptic number.

It is an amenable number.

20507136612736 is a deficient number, since it is larger than the sum of its proper divisors (20371491515264).

20507136612736 is an equidigital number, since it uses as much as digits as its factorization.

20507136612736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96340826 (or 96340814 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 49.

The spelling of 20507136612736 in words is "twenty trillion, five hundred seven billion, one hundred thirty-six million, six hundred twelve thousand, seven hundred thirty-six".