2103485805 has 12 divisors (see below), whose sum is σ = 3646042140. Its totient is φ = 1121859072.

The previous prime is 2103485767. The next prime is 2103485809. The reversal of 2103485805 is 5085843012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1405575081 + 697910724 = 37491^2 + 26418^2 .

It is not a de Polignac number, because 2103485805 - 2¹⁰ = 2103484781 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2103485805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103485809) 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 11 ways as a sum of consecutive naturals, for example, 23372020 + ... + 23372109.

It is an arithmetic number, because the mean of its divisors is an integer number (303836845).

Almost surely, 2^2103485805 is an apocalyptic number.

It is an amenable number.

2103485805 is a deficient number, since it is larger than the sum of its proper divisors (1542556335).

2103485805 is a wasteful number, since it uses less digits than its factorization.

2103485805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46744140 (or 46744137 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 2103485805 is about 45863.7744303715. The cubic root of 2103485805 is about 1281.2873208086.

It can be divided in two parts, 210348 and 5805, that added together give a triangular number (216153 = T₆₅₇).

The spelling of 2103485805 in words is "two billion, one hundred three million, four hundred eighty-five thousand, eight hundred five".