20620512271 has 4 divisors (see below), whose sum is σ = 21100059112. Its totient is φ = 20140965432.

The previous prime is 20620512259. The next prime is 20620512277. The reversal of 20620512271 is 17221502602.

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 20620512271 - 2⁵ = 20620512239 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 (20620512277) 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, 239773356 + ... + 239773441.

It is an arithmetic number, because the mean of its divisors is an integer number (5275014778).

Almost surely, 2^20620512271 is an apocalyptic number.

20620512271 is a deficient number, since it is larger than the sum of its proper divisors (479546841).

20620512271 is an equidigital number, since it uses as much as digits as its factorization.

20620512271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479546840.

The product of its (nonzero) digits is 3360, while the sum is 28.

The spelling of 20620512271 in words is "twenty billion, six hundred twenty million, five hundred twelve thousand, two hundred seventy-one".