2105907804 has 144 divisors (see below), whose sum is σ = 7147445760. Its totient is φ = 504904320.

The previous prime is 2105907781. The next prime is 2105907833. The reversal of 2105907804 is 4087095012.

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 (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6817 + ... + 65255.

It is an arithmetic number, because the mean of its divisors is an integer number (49635040).

Almost surely, 2^2105907804 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 2105907804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3573722880).

2105907804 is an abundant number, since it is smaller than the sum of its proper divisors (5041537956).

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

2105907804 is a wasteful number, since it uses less digits than its factorization.

2105907804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58480 (or 58475 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 2105907804 is about 45890.1711044969. The cubic root of 2105907804 is about 1281.7788994862.

It can be divided in two parts, 2105 and 907804, that added together give a palindrome (909909).

The spelling of 2105907804 in words is "two billion, one hundred five million, nine hundred seven thousand, eight hundred four".