4545304021 has 4 divisors (see below), whose sum is σ = 4545536044. Its totient is φ = 4545072000.

The previous prime is 4545304007. The next prime is 4545304069. The reversal of 4545304021 is 1204035454.

4545304021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3983376996 + 561927025 = 63114^2 + 23705^2 .

It is a cyclic number.

It is not a de Polignac number, because 4545304021 - 2⁵ = 4545303989 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 (4545334021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83610 + ... + 126811.

It is an arithmetic number, because the mean of its divisors is an integer number (1136384011).

Almost surely, 2^4545304021 is an apocalyptic number.

It is an amenable number.

4545304021 is a deficient number, since it is larger than the sum of its proper divisors (232023).

4545304021 is a wasteful number, since it uses less digits than its factorization.

4545304021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232022.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 4545304021 is about 67418.8699178502. The cubic root of 4545304021 is about 1656.4855269069.

Adding to 4545304021 its reverse (1204035454), we get a palindrome (5749339475).

The spelling of 4545304021 in words is "four billion, five hundred forty-five million, three hundred four thousand, twenty-one".