21082690259 has 2 divisors, whose sum is σ = 21082690260. Its totient is φ = 21082690258.

The previous prime is 21082690163. The next prime is 21082690297. The reversal of 21082690259 is 95209628012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21082690259 - 2²⁰ = 21081641683 is a prime.

It is not a weakly prime, because it can be changed into another prime (21082692259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10541345129 + 10541345130.

It is an arithmetic number, because the mean of its divisors is an integer number (10541345130).

Almost surely, 2^21082690259 is an apocalyptic number.

21082690259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21082690259 is an equidigital number, since it uses as much as digits as its factorization.

21082690259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 21082690259 in words is "twenty-one billion, eighty-two million, six hundred ninety thousand, two hundred fifty-nine".