2105500404 has 72 divisors (see below), whose sum is σ = 5735717568. Its totient is φ = 599383680.

The previous prime is 2105500403. The next prime is 2105500417. The reversal of 2105500404 is 4040055012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105500403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158857 + ... + 171599.

It is an arithmetic number, because the mean of its divisors is an integer number (79662744).

Almost surely, 2^2105500404 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 2105500404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2867858784).

2105500404 is an abundant number, since it is smaller than the sum of its proper divisors (3630217164).

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

2105500404 is a wasteful number, since it uses less digits than its factorization.

2105500404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13045 (or 13036 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 2105500404 is about 45885.7320307740. The cubic root of 2105500404 is about 1281.6962383174.

Adding to 2105500404 its reverse (4040055012), we get a palindrome (6145555416).

The spelling of 2105500404 in words is "two billion, one hundred five million, five hundred thousand, four hundred four".