20036871 has 6 divisors (see below), whose sum is σ = 28942160. Its totient is φ = 13357908.

The previous prime is 20036851. The next prime is 20036879. The reversal of 20036871 is 17863002.

It is not a de Polignac number, because 20036871 - 2⁷ = 20036743 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 (20036879) 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 5 ways as a sum of consecutive naturals, for example, 1113151 + ... + 1113168.

Almost surely, 2^20036871 is an apocalyptic number.

20036871 is a deficient number, since it is larger than the sum of its proper divisors (8905289).

20036871 is a wasteful number, since it uses less digits than its factorization.

20036871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226325 (or 2226322 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20036871 is about 4476.2563599508. The cubic root of 20036871 is about 271.6084647462.

Adding to 20036871 its reverse (17863002), we get a palindrome (37899873).

The spelling of 20036871 in words is "twenty million, thirty-six thousand, eight hundred seventy-one".