20270173562137 has 2 divisors, whose sum is σ = 20270173562138. Its totient is φ = 20270173562136.

The previous prime is 20270173562059. The next prime is 20270173562173. The reversal of 20270173562137 is 73126537107202.

Together with next prime (20270173562173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19913156557056 + 357017005081 = 4462416^2 + 597509^2 .

It is a cyclic number.

It is not a de Polignac number, because 20270173562137 - 2²³ = 20270165173529 is a prime.

It is not a weakly prime, because it can be changed into another prime (20270173532137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10135086781068 + 10135086781069.

It is an arithmetic number, because the mean of its divisors is an integer number (10135086781069).

Almost surely, 2^{20270173562137} is an apocalyptic number.

It is an amenable number.

20270173562137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20270173562137 is an equidigital number, since it uses as much as digits as its factorization.

20270173562137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740880, while the sum is 46.

The spelling of 20270173562137 in words is "twenty trillion, two hundred seventy billion, one hundred seventy-three million, five hundred sixty-two thousand, one hundred thirty-seven".