20012443001329 has 2 divisors, whose sum is σ = 20012443001330. Its totient is φ = 20012443001328.

The previous prime is 20012443001297. The next prime is 20012443001333. The reversal of 20012443001329 is 92310034421002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17330136050704 + 2682306950625 = 4162948^2 + 1637775^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012443001329 - 2⁵ = 20012443001297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20012443001329.

It is not a weakly prime, because it can be changed into another prime (20012443008329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006221500664 + 10006221500665.

It is an arithmetic number, because the mean of its divisors is an integer number (10006221500665).

Almost surely, 2^{20012443001329} is an apocalyptic number.

It is an amenable number.

20012443001329 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012443001329 is an equidigital number, since it uses as much as digits as its factorization.

20012443001329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 20012443001329 in words is "twenty trillion, twelve billion, four hundred forty-three million, one thousand, three hundred twenty-nine".