2040452405 has 4 divisors (see below), whose sum is σ = 2448542892. Its totient is φ = 1632361920.

The previous prime is 2040452363. The next prime is 2040452467. The reversal of 2040452405 is 5042540402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5042540402 = 2 ⋅2521270201.

It can be written as a sum of positive squares in 2 ways, for example, as 233692369 + 1806760036 = 15287^2 + 42506^2 .

It is not a de Polignac number, because 2040452405 - 2¹⁰ = 2040451381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 204045236 + ... + 204045245.

It is an arithmetic number, because the mean of its divisors is an integer number (612135723).

Almost surely, 2^2040452405 is an apocalyptic number.

It is an amenable number.

2040452405 is a deficient number, since it is larger than the sum of its proper divisors (408090487).

2040452405 is an equidigital number, since it uses as much as digits as its factorization.

2040452405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408090486.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 2040452405 is about 45171.3670924403. The cubic root of 2040452405 is about 1268.3588873322.

Adding to 2040452405 its reverse (5042540402), we get a palindrome (7082992807).

The spelling of 2040452405 in words is "two billion, forty million, four hundred fifty-two thousand, four hundred five".