20838808271 has 4 divisors (see below), whose sum is σ = 21124271472. Its totient is φ = 20553345072.

The previous prime is 20838808231. The next prime is 20838808337. The reversal of 20838808271 is 17280883802.

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 20838808271 - 2²² = 20834613967 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 (20838808231) 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, 142731491 + ... + 142731636.

It is an arithmetic number, because the mean of its divisors is an integer number (5281067868).

Almost surely, 2^20838808271 is an apocalyptic number.

20838808271 is a deficient number, since it is larger than the sum of its proper divisors (285463201).

20838808271 is an equidigital number, since it uses as much as digits as its factorization.

20838808271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285463200.

The product of its (nonzero) digits is 344064, while the sum is 47.

The spelling of 20838808271 in words is "twenty billion, eight hundred thirty-eight million, eight hundred eight thousand, two hundred seventy-one".