21704700271 has 2 divisors, whose sum is σ = 21704700272. Its totient is φ = 21704700270.

The previous prime is 21704700257. The next prime is 21704700307. The reversal of 21704700271 is 17200740712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21704700271 - 2¹⁷ = 21704569199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21704700211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10852350135 + 10852350136.

It is an arithmetic number, because the mean of its divisors is an integer number (10852350136).

Almost surely, 2^21704700271 is an apocalyptic number.

21704700271 is a deficient number, since it is larger than the sum of its proper divisors (1).

21704700271 is an equidigital number, since it uses as much as digits as its factorization.

21704700271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5488, while the sum is 31.

The spelling of 21704700271 in words is "twenty-one billion, seven hundred four million, seven hundred thousand, two hundred seventy-one".