2102107800 has 384 divisors, whose sum is σ = 7559516160. Its totient is φ = 478617600.

The previous prime is 2102107771. The next prime is 2102107811. The reversal of 2102107800 is 87012012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11005705 + ... + 11005895.

It is an arithmetic number, because the mean of its divisors is an integer number (19686240).

Almost surely, 2^2102107800 is an apocalyptic number.

2102107800 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 2102107800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3779758080).

2102107800 is an abundant number, since it is smaller than the sum of its proper divisors (5457408360).

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

2102107800 is a wasteful number, since it uses less digits than its factorization.

2102107800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 2102107800 is about 45848.7491650536. The cubic root of 2102107800 is about 1281.0074669225.

Adding to 2102107800 its reverse (87012012), we get a palindrome (2189119812).

The spelling of 2102107800 in words is "two billion, one hundred two million, one hundred seven thousand, eight hundred".