20800271 has 4 divisors (see below), whose sum is σ = 20852544. Its totient is φ = 20748000.

The previous prime is 20800229. The next prime is 20800277. The reversal of 20800271 is 17200802.

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 20800271 - 2¹⁴ = 20783887 is a prime.

It is a Duffinian number.

20800271 is a modest number, since divided by 271 gives 208 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20800277) 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, 25535 + ... + 26336.

It is an arithmetic number, because the mean of its divisors is an integer number (5213136).

Almost surely, 2^20800271 is an apocalyptic number.

20800271 is a deficient number, since it is larger than the sum of its proper divisors (52273).

20800271 is an equidigital number, since it uses as much as digits as its factorization.

20800271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52272.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 20800271 is about 4560.7314106402. The cubic root of 20800271 is about 275.0149677804.

The spelling of 20800271 in words is "twenty million, eight hundred thousand, two hundred seventy-one".