20003507324729 has 2 divisors, whose sum is σ = 20003507324730. Its totient is φ = 20003507324728.

The previous prime is 20003507324693. The next prime is 20003507324813. The reversal of 20003507324729 is 92742370530002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18813776125225 + 1189731199504 = 4337485^2 + 1090748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20003507324729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20003507324729.

It is not a weakly prime, because it can be changed into another prime (20003507324629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001753662364 + 10001753662365.

It is an arithmetic number, because the mean of its divisors is an integer number (10001753662365).

Almost surely, 2^{20003507324729} is an apocalyptic number.

It is an amenable number.

20003507324729 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003507324729 is an equidigital number, since it uses as much as digits as its factorization.

20003507324729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 44.

The spelling of 20003507324729 in words is "twenty trillion, three billion, five hundred seven million, three hundred twenty-four thousand, seven hundred twenty-nine".