4449016021 has 2 divisors, whose sum is σ = 4449016022. Its totient is φ = 4449016020.

The previous prime is 4449016007. The next prime is 4449016037. The reversal of 4449016021 is 1206109444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4405640625 + 43375396 = 66375^2 + 6586^2 .

It is a cyclic number.

It is not a de Polignac number, because 4449016021 - 2¹¹ = 4449013973 is a prime.

It is a super-2 number, since 2×4449016021² = 39587487110229344882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4449016001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2224508010 + 2224508011.

It is an arithmetic number, because the mean of its divisors is an integer number (2224508011).

Almost surely, 2^4449016021 is an apocalyptic number.

It is an amenable number.

4449016021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4449016021 is an equidigital number, since it uses as much as digits as its factorization.

4449016021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 4449016021 is about 66700.9446784676. The cubic root of 4449016021 is about 1644.7049135793.

The spelling of 4449016021 in words is "four billion, four hundred forty-nine million, sixteen thousand, twenty-one".