20117504770267 has 2 divisors, whose sum is σ = 20117504770268. Its totient is φ = 20117504770266.

The previous prime is 20117504770219. The next prime is 20117504770357. The reversal of 20117504770267 is 76207740571102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20117504770267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20117504770267.

It is not a weakly prime, because it can be changed into another prime (20117504770667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058752385133 + 10058752385134.

It is an arithmetic number, because the mean of its divisors is an integer number (10058752385134).

Almost surely, 2^{20117504770267} is an apocalyptic number.

20117504770267 is a deficient number, since it is larger than the sum of its proper divisors (1).

20117504770267 is an equidigital number, since it uses as much as digits as its factorization.

20117504770267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152480, while the sum is 49.

The spelling of 20117504770267 in words is "twenty trillion, one hundred seventeen billion, five hundred four million, seven hundred seventy thousand, two hundred sixty-seven".