20125536364169 has 2 divisors, whose sum is σ = 20125536364170. Its totient is φ = 20125536364168.

The previous prime is 20125536364159. The next prime is 20125536364217. The reversal of 20125536364169 is 96146363552102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16392093151225 + 3733443212944 = 4048715^2 + 1932212^2 .

It is a cyclic number.

It is not a de Polignac number, because 20125536364169 - 2¹² = 20125536360073 is a prime.

It is a super-2 number, since 2×20125536364169² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20125536364169.

It is not a weakly prime, because it can be changed into another prime (20125536364159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062768182084 + 10062768182085.

It is an arithmetic number, because the mean of its divisors is an integer number (10062768182085).

Almost surely, 2^{20125536364169} is an apocalyptic number.

It is an amenable number.

20125536364169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20125536364169 is an equidigital number, since it uses as much as digits as its factorization.

20125536364169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 20125536364169 in words is "twenty trillion, one hundred twenty-five billion, five hundred thirty-six million, three hundred sixty-four thousand, one hundred sixty-nine".