21710508869 has 8 divisors (see below), whose sum is σ = 26271540288. Its totient is φ = 17514360000.

The previous prime is 21710508851. The next prime is 21710508889. The reversal of 21710508869 is 96880501712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21710508869 - 2³² = 17415541573 is a prime.

It is a super-2 number, since 2×21710508869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21710508839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91220507 + ... + 91220744.

It is an arithmetic number, because the mean of its divisors is an integer number (3283942536).

Almost surely, 2^21710508869 is an apocalyptic number.

It is an amenable number.

21710508869 is a deficient number, since it is larger than the sum of its proper divisors (4561031419).

21710508869 is a wasteful number, since it uses less digits than its factorization.

21710508869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182441275.

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 21710508869 in words is "twenty-one billion, seven hundred ten million, five hundred eight thousand, eight hundred sixty-nine".