20516525271 has 24 divisors (see below), whose sum is σ = 33202834704. Its totient is φ = 12098194560.

The previous prime is 20516525231. The next prime is 20516525273. The reversal of 20516525271 is 17252561502.

20516525271 is a `hidden beast` number, since 20 + 51 + 65 + 2 + 527 + 1 = 666.

It is not a de Polignac number, because 20516525271 - 2⁶ = 20516525207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516525273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2796846 + ... + 2804171.

It is an arithmetic number, because the mean of its divisors is an integer number (1383451446).

Almost surely, 2^20516525271 is an apocalyptic number.

20516525271 is a deficient number, since it is larger than the sum of its proper divisors (12686309433).

20516525271 is a wasteful number, since it uses less digits than its factorization.

20516525271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5601071 (or 5601068 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 20516525271 in words is "twenty billion, five hundred sixteen million, five hundred twenty-five thousand, two hundred seventy-one".