4021945633 has 2 divisors, whose sum is σ = 4021945634. Its totient is φ = 4021945632.

The previous prime is 4021945589. The next prime is 4021945643. The reversal of 4021945633 is 3365491204.

4021945633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2971667169 + 1050278464 = 54513^2 + 32408^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021945633 - 2¹³ = 4021937441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4021945592 and 4021945601.

It is not a weakly prime, because it can be changed into another prime (4021945643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010972816 + 2010972817.

It is an arithmetic number, because the mean of its divisors is an integer number (2010972817).

Almost surely, 2^4021945633 is an apocalyptic number.

It is an amenable number.

4021945633 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021945633 is an equidigital number, since it uses as much as digits as its factorization.

4021945633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 4021945633 is about 63418.8113496303. The cubic root of 4021945633 is about 1590.2988024068.

The spelling of 4021945633 in words is "four billion, twenty-one million, nine hundred forty-five thousand, six hundred thirty-three".