21083989259 has 2 divisors, whose sum is σ = 21083989260. Its totient is φ = 21083989258.

The previous prime is 21083989253. The next prime is 21083989321. The reversal of 21083989259 is 95298938012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21083989259 - 2⁴ = 21083989243 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21083989253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10541994629 + 10541994630.

It is an arithmetic number, because the mean of its divisors is an integer number (10541994630).

Almost surely, 2^21083989259 is an apocalyptic number.

21083989259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21083989259 is an equidigital number, since it uses as much as digits as its factorization.

21083989259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 56.

The spelling of 21083989259 in words is "twenty-one billion, eighty-three million, nine hundred eighty-nine thousand, two hundred fifty-nine".