2045324021 has 6 divisors (see below), whose sum is σ = 2214759330. Its totient is φ = 1887991248.

The previous prime is 2045324011. The next prime is 2045324053. The reversal of 2045324021 is 1204235402.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5808100 + 2039515921 = 2410^2 + 45161^2 .

It is not a de Polignac number, because 2045324021 - 2¹⁸ = 2045061877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045324011) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6051086 + ... + 6051423.

It is an arithmetic number, because the mean of its divisors is an integer number (369126555).

Almost surely, 2^2045324021 is an apocalyptic number.

It is an amenable number.

2045324021 is a deficient number, since it is larger than the sum of its proper divisors (169435309).

2045324021 is a wasteful number, since it uses less digits than its factorization.

2045324021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12102535 (or 12102522 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2045324021 is about 45225.2586615046. The cubic root of 2045324021 is about 1269.3674947845.

Adding to 2045324021 its reverse (1204235402), we get a palindrome (3249559423).

The spelling of 2045324021 in words is "two billion, forty-five million, three hundred twenty-four thousand, twenty-one".