21430716429 has 4 divisors (see below), whose sum is σ = 28574288576. Its totient is φ = 14287144284.

The previous prime is 21430716403. The next prime is 21430716431. The reversal of 21430716429 is 92461703412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21430716429 - 2⁷ = 21430716301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21430716469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3571786069 + ... + 3571786074.

It is an arithmetic number, because the mean of its divisors is an integer number (7143572144).

Almost surely, 2^21430716429 is an apocalyptic number.

It is an amenable number.

21430716429 is a deficient number, since it is larger than the sum of its proper divisors (7143572147).

21430716429 is an equidigital number, since it uses as much as digits as its factorization.

21430716429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7143572146.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 21430716429 in words is "twenty-one billion, four hundred thirty million, seven hundred sixteen thousand, four hundred twenty-nine".