20255871 has 4 divisors (see below), whose sum is σ = 27007832. Its totient is φ = 13503912.

The previous prime is 20255839. The next prime is 20255897. The reversal of 20255871 is 17855202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20255871 - 2⁵ = 20255839 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 (20255171) 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, 3375976 + ... + 3375981.

It is an arithmetic number, because the mean of its divisors is an integer number (6751958).

Almost surely, 2^20255871 is an apocalyptic number.

20255871 is a deficient number, since it is larger than the sum of its proper divisors (6751961).

20255871 is an equidigital number, since it uses as much as digits as its factorization.

20255871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6751960.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 20255871 is about 4500.6522860581. The cubic root of 20255871 is about 272.5944278981.

The spelling of 20255871 in words is "twenty million, two hundred fifty-five thousand, eight hundred seventy-one".