20972016269 has 2 divisors, whose sum is σ = 20972016270. Its totient is φ = 20972016268.

The previous prime is 20972016257. The next prime is 20972016293. The reversal of 20972016269 is 96261027902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11201682244 + 9770334025 = 105838^2 + 98845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20972016269 is a prime.

It is a super-2 number, since 2×20972016269² (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 (20972016869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10486008134 + 10486008135.

It is an arithmetic number, because the mean of its divisors is an integer number (10486008135).

Almost surely, 2^20972016269 is an apocalyptic number.

It is an amenable number.

20972016269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20972016269 is an equidigital number, since it uses as much as digits as its factorization.

20972016269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 20972016269 in words is "twenty billion, nine hundred seventy-two million, sixteen thousand, two hundred sixty-nine".