4494530021 has 2 divisors, whose sum is σ = 4494530022. Its totient is φ = 4494530020.

The previous prime is 4494529967. The next prime is 4494530069. The reversal of 4494530021 is 1200354944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4494227521 + 302500 = 67039^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 4494530021 - 2²⁶ = 4427421157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4494530021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4494538021) by changing a digit.

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 as a sum of consecutive naturals, namely, 2247265010 + 2247265011.

It is an arithmetic number, because the mean of its divisors is an integer number (2247265011).

Almost surely, 2^4494530021 is an apocalyptic number.

It is an amenable number.

4494530021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4494530021 is an equidigital number, since it uses as much as digits as its factorization.

4494530021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 4494530021 is about 67041.2561114423. The cubic root of 4494530021 is about 1650.2944097855.

Adding to 4494530021 its reverse (1200354944), we get a palindrome (5694884965).

The spelling of 4494530021 in words is "four billion, four hundred ninety-four million, five hundred thirty thousand, twenty-one".