4020918557 has 6 divisors (see below), whose sum is σ = 4271356698. Its totient is φ = 3784393664.

The previous prime is 4020918521. The next prime is 4020918589. The reversal of 4020918557 is 7558190204.

It can be written as a sum of positive squares in 3 ways, for example, as 664917796 + 3356000761 = 25786^2 + 57931^2 .

It is not a de Polignac number, because 4020918557 - 2⁶ = 4020918493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020915557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6956318 + ... + 6956895.

It is an arithmetic number, because the mean of its divisors is an integer number (711892783).

Almost surely, 2^4020918557 is an apocalyptic number.

It is an amenable number.

4020918557 is a deficient number, since it is larger than the sum of its proper divisors (250438141).

4020918557 is a wasteful number, since it uses less digits than its factorization.

4020918557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13913247 (or 13913230 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 4020918557 is about 63410.7132667659. The cubic root of 4020918557 is about 1590.1634204352.

The spelling of 4020918557 in words is "four billion, twenty million, nine hundred eighteen thousand, five hundred fifty-seven".