20271611369 has 2 divisors, whose sum is σ = 20271611370. Its totient is φ = 20271611368.

The previous prime is 20271611351. The next prime is 20271611413. The reversal of 20271611369 is 96311617202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19871131225 + 400480144 = 140965^2 + 20012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20271611369 is a prime.

It is a super-3 number, since 3×20271611369³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (20274611369) 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, 10135805684 + 10135805685.

It is an arithmetic number, because the mean of its divisors is an integer number (10135805685).

Almost surely, 2^20271611369 is an apocalyptic number.

It is an amenable number.

20271611369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20271611369 is an equidigital number, since it uses as much as digits as its factorization.

20271611369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 20271611369 in words is "twenty billion, two hundred seventy-one million, six hundred eleven thousand, three hundred sixty-nine".