21430714871 has 2 divisors, whose sum is σ = 21430714872. Its totient is φ = 21430714870.

The previous prime is 21430714847. The next prime is 21430714937. The reversal of 21430714871 is 17841703412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21430714871 - 2¹⁰ = 21430713847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21430714841) 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, 10715357435 + 10715357436.

It is an arithmetic number, because the mean of its divisors is an integer number (10715357436).

Almost surely, 2^21430714871 is an apocalyptic number.

21430714871 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430714871 is an equidigital number, since it uses as much as digits as its factorization.

21430714871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 38.

The spelling of 21430714871 in words is "twenty-one billion, four hundred thirty million, seven hundred fourteen thousand, eight hundred seventy-one".