20676406169 has 2 divisors, whose sum is σ = 20676406170. Its totient is φ = 20676406168.

The previous prime is 20676406087. The next prime is 20676406181. The reversal of 20676406169 is 96160467602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20300550400 + 375855769 = 142480^2 + 19387^2 .

It is a cyclic number.

It is not a de Polignac number, because 20676406169 - 2⁸ = 20676405913 is a prime.

It is a super-2 number, since 2×20676406169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20676406369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10338203084 + 10338203085.

It is an arithmetic number, because the mean of its divisors is an integer number (10338203085).

Almost surely, 2^20676406169 is an apocalyptic number.

It is an amenable number.

20676406169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20676406169 is an equidigital number, since it uses as much as digits as its factorization.

20676406169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 20676406169 in words is "twenty billion, six hundred seventy-six million, four hundred six thousand, one hundred sixty-nine".