20117557222153 has 2 divisors, whose sum is σ = 20117557222154. Its totient is φ = 20117557222152.

The previous prime is 20117557222109. The next prime is 20117557222163. The reversal of 20117557222153 is 35122275571102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18235743930889 + 1881813291264 = 4270333^2 + 1371792^2 .

It is a cyclic number.

It is not a de Polignac number, because 20117557222153 - 2³³ = 20108967287561 is a prime.

It is a super-2 number, since 2×20117557222153² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20117557222163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058778611076 + 10058778611077.

It is an arithmetic number, because the mean of its divisors is an integer number (10058778611077).

Almost surely, 2^{20117557222153} is an apocalyptic number.

It is an amenable number.

20117557222153 is a deficient number, since it is larger than the sum of its proper divisors (1).

20117557222153 is an equidigital number, since it uses as much as digits as its factorization.

20117557222153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294000, while the sum is 43.

The spelling of 20117557222153 in words is "twenty trillion, one hundred seventeen billion, five hundred fifty-seven million, two hundred twenty-two thousand, one hundred fifty-three".