4020434641 has 2 divisors, whose sum is σ = 4020434642. Its totient is φ = 4020434640.

The previous prime is 4020434623. The next prime is 4020434651. The reversal of 4020434641 is 1464340204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3638623041 + 381811600 = 60321^2 + 19540^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020434641 - 2⁷ = 4020434513 is a prime.

It is not a weakly prime, because it can be changed into another prime (4020434651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010217320 + 2010217321.

It is an arithmetic number, because the mean of its divisors is an integer number (2010217321).

Almost surely, 2^4020434641 is an apocalyptic number.

It is an amenable number.

4020434641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020434641 is an equidigital number, since it uses as much as digits as its factorization.

4020434641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 4020434641 is about 63406.8974244916. The cubic root of 4020434641 is about 1590.0996260242.

Adding to 4020434641 its reverse (1464340204), we get a palindrome (5484774845).

The spelling of 4020434641 in words is "four billion, twenty million, four hundred thirty-four thousand, six hundred forty-one".