20061636028688 has 20 divisors (see below), whose sum is σ = 38889866692428. Its totient is φ = 10025541398400.

The previous prime is 20061636028669. The next prime is 20061636028717. The reversal of 20061636028688 is 88682063616002.

It can be written as a sum of positive squares in 2 ways, for example, as 737242042384 + 19324393986304 = 858628^2 + 4395952^2 .

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, 329757131 + ... + 329817962.

Almost surely, 2^{20061636028688} is an apocalyptic number.

It is an amenable number.

20061636028688 is a deficient number, since it is larger than the sum of its proper divisors (18828230663740).

20061636028688 is a wasteful number, since it uses less digits than its factorization.

20061636028688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659577002 (or 659576996 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 56.

The spelling of 20061636028688 in words is "twenty trillion, sixty-one billion, six hundred thirty-six million, twenty-eight thousand, six hundred eighty-eight".