20673755934417 has 6 divisors (see below), whose sum is σ = 29862091905282. Its totient is φ = 13782503956272.

The previous prime is 20673755934397. The next prime is 20673755934431. The reversal of 20673755934417 is 71443955737602.

20673755934417 is a `hidden beast` number, since 2 + 0 + 6 + 7 + 3 + 7 + 559 + 34 + 41 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19641126012561 + 1032629921856 = 4431831^2 + 1016184^2 .

It is not a de Polignac number, because 20673755934417 - 2⁶ = 20673755934353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20673755934917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1148541996348 + ... + 1148541996365.

It is an arithmetic number, because the mean of its divisors is an integer number (4977015317547).

Almost surely, 2^{20673755934417} is an apocalyptic number.

It is an amenable number.

20673755934417 is a deficient number, since it is larger than the sum of its proper divisors (9188335970865).

20673755934417 is a wasteful number, since it uses less digits than its factorization.

20673755934417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297083992719 (or 2297083992716 counting only the distinct ones).

The product of its (nonzero) digits is 133358400, while the sum is 63.

The spelling of 20673755934417 in words is "twenty trillion, six hundred seventy-three billion, seven hundred fifty-five million, nine hundred thirty-four thousand, four hundred seventeen".