20117504772097 has 2 divisors, whose sum is σ = 20117504772098. Its totient is φ = 20117504772096.

The previous prime is 20117504772089. The next prime is 20117504772181. The reversal of 20117504772097 is 79027740571102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19353277383696 + 764227388401 = 4399236^2 + 874201^2 .

It is a cyclic number.

It is not a de Polignac number, because 20117504772097 - 2³ = 20117504772089 is a prime.

It is a super-3 number, since 3×20117504772097³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20117504772037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058752386048 + 10058752386049.

It is an arithmetic number, because the mean of its divisors is an integer number (10058752386049).

Almost surely, 2^{20117504772097} is an apocalyptic number.

It is an amenable number.

20117504772097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20117504772097 is an equidigital number, since it uses as much as digits as its factorization.

20117504772097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728720, while the sum is 52.

The spelling of 20117504772097 in words is "twenty trillion, one hundred seventeen billion, five hundred four million, seven hundred seventy-two thousand, ninety-seven".