21083253587843 has 2 divisors, whose sum is σ = 21083253587844. Its totient is φ = 21083253587842.

The previous prime is 21083253587821. The next prime is 21083253587897. The reversal of 21083253587843 is 34878535238012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21083253587843 - 2¹⁸ = 21083253325699 is a prime.

It is not a weakly prime, because it can be changed into another prime (21083253547843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10541626793921 + 10541626793922.

It is an arithmetic number, because the mean of its divisors is an integer number (10541626793922).

Almost surely, 2^{21083253587843} is an apocalyptic number.

21083253587843 is a deficient number, since it is larger than the sum of its proper divisors (1).

21083253587843 is an equidigital number, since it uses as much as digits as its factorization.

21083253587843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38707200, while the sum is 59.

The spelling of 21083253587843 in words is "twenty-one trillion, eighty-three billion, two hundred fifty-three million, five hundred eighty-seven thousand, eight hundred forty-three".