20871300 has 72 divisors (see below), whose sum is σ = 62496000. Its totient is φ = 5371520.

The previous prime is 20871299. The next prime is 20871311. The reversal of 20871300 is 317802.

It is a super-2 number, since 2×20871300² = 871222327380000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7501 + ... + 9899.

It is an arithmetic number, because the mean of its divisors is an integer number (868000).

Almost surely, 2^20871300 is an apocalyptic number.

20871300 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 20871300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31248000).

20871300 is an abundant number, since it is smaller than the sum of its proper divisors (41624700).

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

20871300 is a wasteful number, since it uses less digits than its factorization.

20871300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 20871300 is about 4568.5117926957. The cubic root of 20871300 is about 275.3276535336.

The spelling of 20871300 in words is "twenty million, eight hundred seventy-one thousand, three hundred".