20871360 has 84 divisors (see below), whose sum is σ = 71798688. Its totient is φ = 5564928.

The previous prime is 20871353. The next prime is 20871379. The reversal of 20871360 is 6317802.

It is a super-2 number, since 2×20871360² = 871227336499200, which contains 22 as substring.

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, 744 + ... + 6503.

Almost surely, 2^20871360 is an apocalyptic number.

20871360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20871360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35899344).

20871360 is an abundant number, since it is smaller than the sum of its proper divisors (50927328).

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

20871360 is a wasteful number, since it uses less digits than its factorization.

20871360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7270 (or 7257 counting only the distinct ones).

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

The square root of 20871360 is about 4568.5183593809. The cubic root of 20871360 is about 275.3279173671.

The spelling of 20871360 in words is "twenty million, eight hundred seventy-one thousand, three hundred sixty".