21234130459 has 2 divisors, whose sum is σ = 21234130460. Its totient is φ = 21234130458.

The previous prime is 21234130343. The next prime is 21234130471. The reversal of 21234130459 is 95403143212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21234130459 - 2⁷ = 21234130331 is a prime.

It is not a weakly prime, because it can be changed into another prime (21234130259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617065229 + 10617065230.

It is an arithmetic number, because the mean of its divisors is an integer number (10617065230).

Almost surely, 2^21234130459 is an apocalyptic number.

21234130459 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234130459 is an equidigital number, since it uses as much as digits as its factorization.

21234130459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 21234130459 in words is "twenty-one billion, two hundred thirty-four million, one hundred thirty thousand, four hundred fifty-nine".