20681692965488 has 10 divisors (see below), whose sum is σ = 40070780120664. Its totient is φ = 10340846482736.

The previous prime is 20681692965443. The next prime is 20681692965499. The reversal of 20681692965488 is 88456929618602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646302905156 + ... + 646302905187.

Almost surely, 2^{20681692965488} is an apocalyptic number.

It is an amenable number.

20681692965488 is a deficient number, since it is larger than the sum of its proper divisors (19389087155176).

20681692965488 is a wasteful number, since it uses less digits than its factorization.

20681692965488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292605810351 (or 1292605810345 counting only the distinct ones).

The product of its (nonzero) digits is 716636160, while the sum is 74.

The spelling of 20681692965488 in words is "twenty trillion, six hundred eighty-one billion, six hundred ninety-two million, nine hundred sixty-five thousand, four hundred eighty-eight".