2043478845 has 12 divisors (see below), whose sum is σ = 3542030076. Its totient is φ = 1089855360.

The previous prime is 2043478813. The next prime is 2043478847. The reversal of 2043478845 is 5488743402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1127750724 + 915728121 = 33582^2 + 30261^2 .

It is not a de Polignac number, because 2043478845 - 2⁵ = 2043478813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 45410641 = 2043478845 / (2 + 0 + 4 + 3 + 4 + 7 + 8 + 8 + 4 + 5).

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 2043478845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043478847) 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, 22705276 + ... + 22705365.

It is an arithmetic number, because the mean of its divisors is an integer number (295169173).

Almost surely, 2^2043478845 is an apocalyptic number.

It is an amenable number.

2043478845 is a deficient number, since it is larger than the sum of its proper divisors (1498551231).

2043478845 is a wasteful number, since it uses less digits than its factorization.

2043478845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45410652 (or 45410649 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 45.

The square root of 2043478845 is about 45204.8542194309. The cubic root of 2043478845 is about 1268.9856626801.

The spelling of 2043478845 in words is "two billion, forty-three million, four hundred seventy-eight thousand, eight hundred forty-five".