21430441434239 has 2 divisors, whose sum is σ = 21430441434240. Its totient is φ = 21430441434238.

The previous prime is 21430441434211. The next prime is 21430441434253. The reversal of 21430441434239 is 93243414403412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21430441434239 - 2¹² = 21430441430143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21430441434239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21430441434209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715220717119 + 10715220717120.

It is an arithmetic number, because the mean of its divisors is an integer number (10715220717120).

Almost surely, 2^{21430441434239} is an apocalyptic number.

21430441434239 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430441434239 is an equidigital number, since it uses as much as digits as its factorization.

21430441434239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 44.

The spelling of 21430441434239 in words is "twenty-one trillion, four hundred thirty billion, four hundred forty-one million, four hundred thirty-four thousand, two hundred thirty-nine".