4534445021 has 4 divisors (see below), whose sum is σ = 4534777500. Its totient is φ = 4534112544.

The previous prime is 4534444933. The next prime is 4534445039. The reversal of 4534445021 is 1205444354.

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 2380464100 + 2153980921 = 48790^2 + 46411^2 .

It is a cyclic number.

It is not a de Polignac number, because 4534445021 - 2²⁶ = 4467336157 is a prime.

It is a super-2 number, since 2×4534445021² = 41122383296943380882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4534445221) 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, 144866 + ... + 173363.

It is an arithmetic number, because the mean of its divisors is an integer number (1133694375).

Almost surely, 2^4534445021 is an apocalyptic number.

It is an amenable number.

4534445021 is a deficient number, since it is larger than the sum of its proper divisors (332479).

4534445021 is a wasteful number, since it uses less digits than its factorization.

4534445021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332478.

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 4534445021 is about 67338.2879274488. The cubic root of 4534445021 is about 1655.1653277213.

Adding to 4534445021 its reverse (1205444354), we get a palindrome (5739889375).

The spelling of 4534445021 in words is "four billion, five hundred thirty-four million, four hundred forty-five thousand, twenty-one".