21430714171 has 4 divisors (see below), whose sum is σ = 21724285672. Its totient is φ = 21137142672.

The previous prime is 21430714159. The next prime is 21430714183. The reversal of 21430714171 is 17141703412.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21430714159) and next prime (21430714183).

It is a cyclic number.

It is not a de Polignac number, because 21430714171 - 2⁵ = 21430714139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21430714871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146785641 + ... + 146785786.

It is an arithmetic number, because the mean of its divisors is an integer number (5431071418).

Almost surely, 2^21430714171 is an apocalyptic number.

21430714171 is a deficient number, since it is larger than the sum of its proper divisors (293571501).

21430714171 is an equidigital number, since it uses as much as digits as its factorization.

21430714171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293571500.

The product of its (nonzero) digits is 4704, while the sum is 31.

The spelling of 21430714171 in words is "twenty-one billion, four hundred thirty million, seven hundred fourteen thousand, one hundred seventy-one".