21444003040973 has 2 divisors, whose sum is σ = 21444003040974. Its totient is φ = 21444003040972.

The previous prime is 21444003040937. The next prime is 21444003041059. The reversal of 21444003040973 is 37904030044412.

Together with previous prime (21444003040937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20732886942244 + 711116098729 = 4553338^2 + 843277^2 .

It is a cyclic number.

It is not a de Polignac number, because 21444003040973 - 2¹⁴ = 21444003024589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21444003040973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21444003045973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10722001520486 + 10722001520487.

It is an arithmetic number, because the mean of its divisors is an integer number (10722001520487).

Almost surely, 2^{21444003040973} is an apocalyptic number.

It is an amenable number.

21444003040973 is a deficient number, since it is larger than the sum of its proper divisors (1).

21444003040973 is an equidigital number, since it uses as much as digits as its factorization.

21444003040973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 21444003040973 in words is "twenty-one trillion, four hundred forty-four billion, three million, forty thousand, nine hundred seventy-three".