2005403045 has 8 divisors (see below), whose sum is σ = 2548041624. Its totient is φ = 1509950464.

The previous prime is 2005403033. The next prime is 2005403077. The reversal of 2005403045 is 5403045002.

It can be written as a sum of positive squares in 4 ways, for example, as 838565764 + 1166837281 = 28958^2 + 34159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2005403045 - 2¹² = 2005398949 is a prime.

It is a Duffinian number.

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 2005403045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11796404 + ... + 11796573.

It is an arithmetic number, because the mean of its divisors is an integer number (318505203).

Almost surely, 2^2005403045 is an apocalyptic number.

It is an amenable number.

2005403045 is a deficient number, since it is larger than the sum of its proper divisors (542638579).

2005403045 is a wasteful number, since it uses less digits than its factorization.

2005403045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23592999.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 2005403045 is about 44781.7266862277. The cubic root of 2005403045 is about 1261.0545980930.

Adding to 2005403045 its reverse (5403045002), we get a palindrome (7408448047).

The spelling of 2005403045 in words is "two billion, five million, four hundred three thousand, forty-five".