20132565671 has 4 divisors (see below), whose sum is σ = 20133547200. Its totient is φ = 20131584144.

The previous prime is 20132565647. The next prime is 20132565679. The reversal of 20132565671 is 17656523102.

It is a happy number.

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 20132565671 - 2¹⁴ = 20132549287 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 (20132565679) 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, 459326 + ... + 501243.

It is an arithmetic number, because the mean of its divisors is an integer number (5033386800).

Almost surely, 2^20132565671 is an apocalyptic number.

20132565671 is a deficient number, since it is larger than the sum of its proper divisors (981529).

20132565671 is an equidigital number, since it uses as much as digits as its factorization.

20132565671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981528.

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 20132565671 in words is "twenty billion, one hundred thirty-two million, five hundred sixty-five thousand, six hundred seventy-one".