20444440040029 has 2 divisors, whose sum is σ = 20444440040030. Its totient is φ = 20444440040028.

The previous prime is 20444440040027. The next prime is 20444440040077. The reversal of 20444440040029 is 92004004444402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19117619416900 + 1326820623129 = 4372370^2 + 1151877^2 .

It is a cyclic number.

It is not a de Polignac number, because 20444440040029 - 2¹ = 20444440040027 is a prime.

Together with 20444440040027, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20444440040029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20444440040027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222220020014 + 10222220020015.

It is an arithmetic number, because the mean of its divisors is an integer number (10222220020015).

Almost surely, 2^{20444440040029} is an apocalyptic number.

It is an amenable number.

20444440040029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20444440040029 is an equidigital number, since it uses as much as digits as its factorization.

20444440040029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 37.

The spelling of 20444440040029 in words is "twenty trillion, four hundred forty-four billion, four hundred forty million, forty thousand, twenty-nine".