2100004025 has 18 divisors (see below), whose sum is σ = 3029150430. Its totient is φ = 1440001920.

The previous prime is 2100004021. The next prime is 2100004037. The reversal of 2100004025 is 5204000012.

It can be written as a sum of positive squares in 3 ways, for example, as 126067984 + 1973936041 = 11228^2 + 44429^2 .

It is not a de Polignac number, because 2100004025 - 2² = 2100004021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100004021) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 855920 + ... + 858369.

It is an arithmetic number, because the mean of its divisors is an integer number (168286135).

Almost surely, 2^2100004025 is an apocalyptic number.

2100004025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2100004025 is a deficient number, since it is larger than the sum of its proper divisors (929146405).

2100004025 is a wasteful number, since it uses less digits than its factorization.

2100004025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714313 (or 1714301 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2100004025 is about 45825.8008658878. The cubic root of 2100004025 is about 1280.5799831348.

Adding to 2100004025 its reverse (5204000012), we get a palindrome (7304004037).

The spelling of 2100004025 in words is "two billion, one hundred million, four thousand, twenty-five".