20087800 has 48 divisors (see below), whose sum is σ = 47720160. Its totient is φ = 7860480.

The previous prime is 20087797. The next prime is 20087813. The reversal of 20087800 is 878002.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent 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, 8332 + ... + 10468.

It is an arithmetic number, because the mean of its divisors is an integer number (994170).

Almost surely, 2^20087800 is an apocalyptic number.

20087800 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 20087800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23860080).

20087800 is an abundant number, since it is smaller than the sum of its proper divisors (27632360).

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

20087800 is a wasteful number, since it uses less digits than its factorization.

20087800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200 (or 2191 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 20087800 is about 4481.9415435724. The cubic root of 20087800 is about 271.8383916005.

The spelling of 20087800 in words is "twenty million, eighty-seven thousand, eight hundred".