20324108018729 has 2 divisors, whose sum is σ = 20324108018730. Its totient is φ = 20324108018728.

The previous prime is 20324108018659. The next prime is 20324108018743. The reversal of 20324108018729 is 92781080142302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20040636962329 + 283471056400 = 4476677^2 + 532420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20324108018729 is a prime.

It is not a weakly prime, because it can be changed into another prime (20324108011729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162054009364 + 10162054009365.

It is an arithmetic number, because the mean of its divisors is an integer number (10162054009365).

Almost surely, 2^{20324108018729} is an apocalyptic number.

It is an amenable number.

20324108018729 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324108018729 is an equidigital number, since it uses as much as digits as its factorization.

20324108018729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 20324108018729 in words is "twenty trillion, three hundred twenty-four billion, one hundred eight million, eighteen thousand, seven hundred twenty-nine".