21430032139 has 2 divisors, whose sum is σ = 21430032140. Its totient is φ = 21430032138.

The previous prime is 21430032089. The next prime is 21430032161. The reversal of 21430032139 is 93123003412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21430032139 - 2²⁹ = 20893161227 is a prime.

It is not a weakly prime, because it can be changed into another prime (21430032739) 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 as a sum of consecutive naturals, namely, 10715016069 + 10715016070.

It is an arithmetic number, because the mean of its divisors is an integer number (10715016070).

Almost surely, 2^21430032139 is an apocalyptic number.

21430032139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430032139 is an equidigital number, since it uses as much as digits as its factorization.

21430032139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 21430032139 in words is "twenty-one billion, four hundred thirty million, thirty-two thousand, one hundred thirty-nine".