20202871 has 16 divisors (see below), whose sum is σ = 23063040. Its totient is φ = 17543520.

The previous prime is 20202863. The next prime is 20202877. The reversal of 20202871 is 17820202.

It is a cyclic number.

It is not a de Polignac number, because 20202871 - 2³ = 20202863 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64806 + ... + 65116.

It is an arithmetic number, because the mean of its divisors is an integer number (1441440).

Almost surely, 2^20202871 is an apocalyptic number.

20202871 is a deficient number, since it is larger than the sum of its proper divisors (2860169).

20202871 is a wasteful number, since it uses less digits than its factorization.

20202871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 20202871 is about 4494.7603940588. The cubic root of 20202871 is about 272.3564701593.

The spelling of 20202871 in words is "twenty million, two hundred two thousand, eight hundred seventy-one".