21352234459 has 2 divisors, whose sum is σ = 21352234460. Its totient is φ = 21352234458.

The previous prime is 21352234457. The next prime is 21352234493. The reversal of 21352234459 is 95443225312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21352234459 - 2¹ = 21352234457 is a prime.

Together with 21352234457, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21352234457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10676117229 + 10676117230.

It is an arithmetic number, because the mean of its divisors is an integer number (10676117230).

Almost surely, 2^21352234459 is an apocalyptic number.

21352234459 is a deficient number, since it is larger than the sum of its proper divisors (1).

21352234459 is an equidigital number, since it uses as much as digits as its factorization.

21352234459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 40.

The spelling of 21352234459 in words is "twenty-one billion, three hundred fifty-two million, two hundred thirty-four thousand, four hundred fifty-nine".