20338677173 has 2 divisors, whose sum is σ = 20338677174. Its totient is φ = 20338677172.

The previous prime is 20338677133. The next prime is 20338677181. The reversal of 20338677173 is 37177683302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12028166929 + 8310510244 = 109673^2 + 91162^2 .

It is a cyclic number.

It is not a de Polignac number, because 20338677173 - 2²⁴ = 20321899957 is a prime.

It is a super-2 number, since 2×20338677173² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20338677133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10169338586 + 10169338587.

It is an arithmetic number, because the mean of its divisors is an integer number (10169338587).

Almost surely, 2^20338677173 is an apocalyptic number.

It is an amenable number.

20338677173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20338677173 is an equidigital number, since it uses as much as digits as its factorization.

20338677173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 20338677173 in words is "twenty billion, three hundred thirty-eight million, six hundred seventy-seven thousand, one hundred seventy-three".