21430714139 has 2 divisors, whose sum is σ = 21430714140. Its totient is φ = 21430714138.

The previous prime is 21430714133. The next prime is 21430714153. The reversal of 21430714139 is 93141703412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21430714139 - 2⁸ = 21430713883 is a prime.

It is a super-2 number, since 2×21430714139² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21430714099 and 21430714108.

It is not a weakly prime, because it can be changed into another prime (21430714133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715357069 + 10715357070.

It is an arithmetic number, because the mean of its divisors is an integer number (10715357070).

Almost surely, 2^21430714139 is an apocalyptic number.

21430714139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430714139 is an equidigital number, since it uses as much as digits as its factorization.

21430714139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 21430714139 in words is "twenty-one billion, four hundred thirty million, seven hundred fourteen thousand, one hundred thirty-nine".