21792019880569 has 2 divisors, whose sum is σ = 21792019880570. Its totient is φ = 21792019880568.

The previous prime is 21792019880437. The next prime is 21792019880581. The reversal of 21792019880569 is 96508891029712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16810106600169 + 4981913280400 = 4100013^2 + 2232020^2 .

It is a cyclic number.

It is not a de Polignac number, because 21792019880569 - 2¹³ = 21792019872377 is a prime.

It is a super-2 number, since 2×21792019880569² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21792019880599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10896009940284 + 10896009940285.

It is an arithmetic number, because the mean of its divisors is an integer number (10896009940285).

Almost surely, 2^{21792019880569} is an apocalyptic number.

It is an amenable number.

21792019880569 is a deficient number, since it is larger than the sum of its proper divisors (1).

21792019880569 is an equidigital number, since it uses as much as digits as its factorization.

21792019880569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39191040, while the sum is 67.

The spelling of 21792019880569 in words is "twenty-one trillion, seven hundred ninety-two billion, nineteen million, eight hundred eighty thousand, five hundred sixty-nine".