20331322979969 has 2 divisors, whose sum is σ = 20331322979970. Its totient is φ = 20331322979968.

The previous prime is 20331322979959. The next prime is 20331322980139. The reversal of 20331322979969 is 96997922313302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20316762937744 + 14560042225 = 4507412^2 + 120665^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331322979969 - 2⁸ = 20331322979713 is a prime.

It is a super-2 number, since 2×20331322979969² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20331322979939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165661489984 + 10165661489985.

It is an arithmetic number, because the mean of its divisors is an integer number (10165661489985).

Almost surely, 2^{20331322979969} is an apocalyptic number.

It is an amenable number.

20331322979969 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331322979969 is an equidigital number, since it uses as much as digits as its factorization.

20331322979969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59521392, while the sum is 65.

The spelling of 20331322979969 in words is "twenty trillion, three hundred thirty-one billion, three hundred twenty-two million, nine hundred seventy-nine thousand, nine hundred sixty-nine".