21710265471 has 12 divisors (see below), whose sum is σ = 31827322072. Its totient is φ = 14257487376.

The previous prime is 21710265407. The next prime is 21710265487. The reversal of 21710265471 is 17456201712.

21710265471 is a `hidden beast` number, since 2 + 1 + 7 + 102 + 6 + 547 + 1 = 666.

It is not a de Polignac number, because 21710265471 - 2⁶ = 21710265407 is a prime.

It is a super-3 number, since 3×21710265471³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21710260471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18001276 + ... + 18002481.

Almost surely, 2^21710265471 is an apocalyptic number.

21710265471 is a deficient number, since it is larger than the sum of its proper divisors (10117056601).

21710265471 is a wasteful number, since it uses less digits than its factorization.

21710265471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36003830 (or 36003827 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The spelling of 21710265471 in words is "twenty-one billion, seven hundred ten million, two hundred sixty-five thousand, four hundred seventy-one".