2005120450 has 48 divisors (see below), whose sum is σ = 3922606080. Its totient is φ = 761080320.

The previous prime is 2005120441. The next prime is 2005120493. The reversal of 2005120450 is 540215002.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 139186 + ... + 152914.

It is an arithmetic number, because the mean of its divisors is an integer number (81720960).

Almost surely, 2^2005120450 is an apocalyptic number.

2005120450 is a deficient number, since it is larger than the sum of its proper divisors (1917485630).

2005120450 is a wasteful number, since it uses less digits than its factorization.

2005120450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13891 (or 13886 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2005120450 is about 44778.5713260260. The cubic root of 2005120450 is about 1260.9953607133.

Adding to 2005120450 its reverse (540215002), we get a palindrome (2545335452).

The spelling of 2005120450 in words is "two billion, five million, one hundred twenty thousand, four hundred fifty".