21041073373 has 2 divisors, whose sum is σ = 21041073374. Its totient is φ = 21041073372.

The previous prime is 21041073367. The next prime is 21041073467. The reversal of 21041073373 is 37337014012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20375278564 + 665794809 = 142742^2 + 25803^2 .

It is a cyclic number.

It is not a de Polignac number, because 21041073373 - 2¹⁷ = 21040942301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21041073323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10520536686 + 10520536687.

It is an arithmetic number, because the mean of its divisors is an integer number (10520536687).

Almost surely, 2^21041073373 is an apocalyptic number.

It is an amenable number.

21041073373 is a deficient number, since it is larger than the sum of its proper divisors (1).

21041073373 is an equidigital number, since it uses as much as digits as its factorization.

21041073373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 31.

Adding to 21041073373 its reverse (37337014012), we get a palindrome (58378087385).

The spelling of 21041073373 in words is "twenty-one billion, forty-one million, seventy-three thousand, three hundred seventy-three".