20871160 has 32 divisors (see below), whose sum is σ = 47628000. Its totient is φ = 8229760.

The previous prime is 20871157. The next prime is 20871161. The reversal of 20871160 is 6117802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20871161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835 + ... + 6514.

It is an arithmetic number, because the mean of its divisors is an integer number (1488375).

Almost surely, 2^20871160 is an apocalyptic number.

20871160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20871160 is an abundant number, since it is smaller than the sum of its proper divisors (26756840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20871160 is a wasteful number, since it uses less digits than its factorization.

20871160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7431 (or 7427 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 20871160 is about 4568.4964703937. The cubic root of 20871160 is about 275.3270379202.

Adding to 20871160 its reverse (6117802), we get a palindrome (26988962).

The spelling of 20871160 in words is "twenty million, eight hundred seventy-one thousand, one hundred sixty".