20871260 has 24 divisors (see below), whose sum is σ = 43935696. Its totient is φ = 8328320.

The previous prime is 20871251. The next prime is 20871283. The reversal of 20871260 is 6217802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9419 + ... + 11421.

It is an arithmetic number, because the mean of its divisors is an integer number (1830654).

Almost surely, 2^20871260 is an apocalyptic number.

20871260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20871260 is an abundant number, since it is smaller than the sum of its proper divisors (23064436).

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

20871260 is a wasteful number, since it uses less digits than its factorization.

20871260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533 (or 2531 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20871260 is about 4568.5074149004. The cubic root of 20871260 is about 275.3274776443.

The spelling of 20871260 in words is "twenty million, eight hundred seventy-one thousand, two hundred sixty".