20871050 has 24 divisors (see below), whose sum is σ = 39770892. Its totient is φ = 8144000.

The previous prime is 20871049. The next prime is 20871077. The reversal of 20871050 is 5017802.

It can be written as a sum of positive squares in 6 ways, for example, as 3323329 + 17547721 = 1823^2 + 4189^2 .

It is a super-3 number, since 3×20871050³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3041 + ... + 7140.

Almost surely, 2^20871050 is an apocalyptic number.

20871050 is a deficient number, since it is larger than the sum of its proper divisors (18899842).

20871050 is a wasteful number, since it uses less digits than its factorization.

20871050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10234 (or 10229 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 20871050 is about 4568.4844314061. The cubic root of 20871050 is about 275.3265542220.

Adding to 20871050 its reverse (5017802), we get a palindrome (25888852).

The spelling of 20871050 in words is "twenty million, eight hundred seventy-one thousand, fifty".