2104204644 has 18 divisors (see below), whose sum is σ = 5318961830. Its totient is φ = 701401536.

The previous prime is 2104204621. The next prime is 2104204667. The reversal of 2104204644 is 4464024012.

It is a happy number.

2104204644 is a `hidden beast` number, since 2 + 10 + 4 + 2 + 0 + 4 + 644 = 666.

It is an interprime number because it is at equal distance from previous prime (2104204621) and next prime (2104204667).

It can be written as a sum of positive squares in only one way, i.e., 1812204900 + 291999744 = 42570^2 + 17088^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 29225029 + ... + 29225100.

Almost surely, 2^2104204644 is an apocalyptic number.

It is an amenable number.

2104204644 is an abundant number, since it is smaller than the sum of its proper divisors (3214757186).

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

2104204644 is a wasteful number, since it uses less digits than its factorization.

2104204644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58450139 (or 58450134 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 2104204644 is about 45871.6104360856. The cubic root of 2104204644 is about 1281.4332586286.

Adding to 2104204644 its reverse (4464024012), we get a palindrome (6568228656).

The spelling of 2104204644 in words is "two billion, one hundred four million, two hundred four thousand, six hundred forty-four".