21429047327 has 2 divisors, whose sum is σ = 21429047328. Its totient is φ = 21429047326.

The previous prime is 21429047303. The next prime is 21429047359. The reversal of 21429047327 is 72374092412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21429047327 - 2²⁰ = 21427998751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21429047027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10714523663 + 10714523664.

It is an arithmetic number, because the mean of its divisors is an integer number (10714523664).

Almost surely, 2^21429047327 is an apocalyptic number.

21429047327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21429047327 is an equidigital number, since it uses as much as digits as its factorization.

21429047327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 21429047327 in words is "twenty-one billion, four hundred twenty-nine million, forty-seven thousand, three hundred twenty-seven".