21443034293 has 2 divisors, whose sum is σ = 21443034294. Its totient is φ = 21443034292.

The previous prime is 21443034271. The next prime is 21443034323. The reversal of 21443034293 is 39243034412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19237135204 + 2205899089 = 138698^2 + 46967^2 .

It is a cyclic number.

It is not a de Polignac number, because 21443034293 - 2¹⁸ = 21442772149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21443034253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721517146 + 10721517147.

It is an arithmetic number, because the mean of its divisors is an integer number (10721517147).

Almost surely, 2^21443034293 is an apocalyptic number.

It is an amenable number.

21443034293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21443034293 is an equidigital number, since it uses as much as digits as its factorization.

21443034293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 35.

The spelling of 21443034293 in words is "twenty-one billion, four hundred forty-three million, thirty-four thousand, two hundred ninety-three".