21204240059 has 2 divisors, whose sum is σ = 21204240060. Its totient is φ = 21204240058.

The previous prime is 21204240037. The next prime is 21204240089. The reversal of 21204240059 is 95004240212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21204240059 - 2³² = 16909272763 is a prime.

It is not a weakly prime, because it can be changed into another prime (21204240089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10602120029 + 10602120030.

It is an arithmetic number, because the mean of its divisors is an integer number (10602120030).

Almost surely, 2^21204240059 is an apocalyptic number.

21204240059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21204240059 is an equidigital number, since it uses as much as digits as its factorization.

21204240059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 21204240059 in words is "twenty-one billion, two hundred four million, two hundred forty thousand, fifty-nine".