21430441434343 has 2 divisors, whose sum is σ = 21430441434344. Its totient is φ = 21430441434342.

The previous prime is 21430441434341. The next prime is 21430441434397. The reversal of 21430441434343 is 34343414403412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21430441434343 - 2¹ = 21430441434341 is a prime.

Together with 21430441434341, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21430441434296 and 21430441434305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21430441434341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715220717171 + 10715220717172.

It is an arithmetic number, because the mean of its divisors is an integer number (10715220717172).

Almost surely, 2^{21430441434343} is an apocalyptic number.

21430441434343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430441434343 is an equidigital number, since it uses as much as digits as its factorization.

21430441434343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 40.

Adding to 21430441434343 its reverse (34343414403412), we get a palindrome (55773855837755).

The spelling of 21430441434343 in words is "twenty-one trillion, four hundred thirty billion, four hundred forty-one million, four hundred thirty-four thousand, three hundred forty-three".