21834647171 has 4 divisors (see below), whose sum is σ = 21930835272. Its totient is φ = 21738459072.

The previous prime is 21834647147. The next prime is 21834647203. The reversal of 21834647171 is 17174643812.

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

It is a cyclic number.

It is not a de Polignac number, because 21834647171 - 2³⁴ = 4654777987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21834647101) 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, 48093710 + ... + 48094163.

It is an arithmetic number, because the mean of its divisors is an integer number (5482708818).

Almost surely, 2^21834647171 is an apocalyptic number.

21834647171 is a deficient number, since it is larger than the sum of its proper divisors (96188101).

21834647171 is an equidigital number, since it uses as much as digits as its factorization.

21834647171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96188100.

The product of its digits is 225792, while the sum is 44.

The spelling of 21834647171 in words is "twenty-one billion, eight hundred thirty-four million, six hundred forty-seven thousand, one hundred seventy-one".