2100386808 has 128 divisors (see below), whose sum is σ = 6300000000. Its totient is φ = 644547456.

The previous prime is 2100386789. The next prime is 2100386837. The reversal of 2100386808 is 8086830012.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1400443 + ... + 1401941.

It is an arithmetic number, because the mean of its divisors is an integer number (49218750).

Almost surely, 2^2100386808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2100386808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3150000000).

2100386808 is an abundant number, since it is smaller than the sum of its proper divisors (4199613192).

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

2100386808 is a wasteful number, since it uses less digits than its factorization.

2100386808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026 (or 2016 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 2100386808 is about 45829.9771765162. The cubic root of 2100386808 is about 1280.6577852821.

The spelling of 2100386808 in words is "two billion, one hundred million, three hundred eighty-six thousand, eight hundred eight".