20667080914965 has 128 divisors (see below), whose sum is σ = 39639004876800. Its totient is φ = 10192875356160.

The previous prime is 20667080914939. The next prime is 20667080915077. The reversal of 20667080914965 is 56941908076602.

20667080914965 is a `hidden beast` number, since 2 + 0 + 6 + 67 + 0 + 80 + 9 + 1 + 496 + 5 = 666.

It is not a de Polignac number, because 20667080914965 - 2¹¹ = 20667080912917 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10894629 + ... + 12650181.

It is an arithmetic number, because the mean of its divisors is an integer number (309679725600).

Almost surely, 2^{20667080914965} is an apocalyptic number.

It is an amenable number.

20667080914965 is a deficient number, since it is larger than the sum of its proper divisors (18971923961835).

20667080914965 is a wasteful number, since it uses less digits than its factorization.

20667080914965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755724 (or 1755718 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 20667080914965 in words is "twenty trillion, six hundred sixty-seven billion, eighty million, nine hundred fourteen thousand, nine hundred sixty-five".