20523660271 has 4 divisors (see below), whose sum is σ = 20532691872. Its totient is φ = 20514628672.

The previous prime is 20523660259. The next prime is 20523660323. The reversal of 20523660271 is 17206632502.

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 20523660271 - 2¹¹ = 20523658223 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 (20523660221) 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, 4512391 + ... + 4516936.

It is an arithmetic number, because the mean of its divisors is an integer number (5133172968).

Almost surely, 2^20523660271 is an apocalyptic number.

20523660271 is a deficient number, since it is larger than the sum of its proper divisors (9031601).

20523660271 is an equidigital number, since it uses as much as digits as its factorization.

20523660271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9031600.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 20523660271 in words is "twenty billion, five hundred twenty-three million, six hundred sixty thousand, two hundred seventy-one".