21352535671 has 8 divisors (see below), whose sum is σ = 21993809024. Its totient is φ = 20717839800.

The previous prime is 21352535651. The next prime is 21352535713. The reversal of 21352535671 is 17653525312.

It is a happy number.

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 21352535671 - 2¹⁵ = 21352502903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352535641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1637781 + ... + 1650766.

It is an arithmetic number, because the mean of its divisors is an integer number (2749226128).

Almost surely, 2^21352535671 is an apocalyptic number.

21352535671 is a deficient number, since it is larger than the sum of its proper divisors (641273353).

21352535671 is a wasteful number, since it uses less digits than its factorization.

21352535671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288741.

The product of its digits is 189000, while the sum is 40.

The spelling of 21352535671 in words is "twenty-one billion, three hundred fifty-two million, five hundred thirty-five thousand, six hundred seventy-one".