18038020041 has 12 divisors (see below), whose sum is σ = 26138164468. Its totient is φ = 11986925184.

The previous prime is 18038020031. The next prime is 18038020061. The reversal of 18038020041 is 14002083081.

18038020041 is a `hidden beast` number, since 1 + 80 + 380 + 200 + 4 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 129960000 + 17908060041 = 11400^2 + 133821^2 .

It is not a de Polignac number, because 18038020041 - 2⁹ = 18038019529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18038019987 and 18038020014.

It is not an unprimeable number, because it can be changed into a prime (18038020001) 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 in 11 ways as a sum of consecutive naturals, for example, 3198820 + ... + 3204453.

Almost surely, 2^18038020041 is an apocalyptic number.

It is an amenable number.

18038020041 is a deficient number, since it is larger than the sum of its proper divisors (8100144427).

18038020041 is a wasteful number, since it uses less digits than its factorization.

18038020041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6403592 (or 6403589 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The spelling of 18038020041 in words is "eighteen billion, thirty-eight million, twenty thousand, forty-one".