18028043541 has 6 divisors (see below), whose sum is σ = 26040507350. Its totient is φ = 12018695688.

The previous prime is 18028043519. The next prime is 18028043629. The reversal of 18028043541 is 14534082081.

18028043541 is a `hidden beast` number, since 180 + 2 + 8 + 0 + 435 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11230700625 + 6797342916 = 105975^2 + 82446^2 .

It is not a de Polignac number, because 18028043541 - 2¹⁵ = 18028010773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18028043496 and 18028043505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18028043141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1001557966 + ... + 1001557983.

Almost surely, 2^18028043541 is an apocalyptic number.

It is an amenable number.

18028043541 is a deficient number, since it is larger than the sum of its proper divisors (8012463809).

18028043541 is a wasteful number, since it uses less digits than its factorization.

18028043541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003115955 (or 2003115952 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 18028043541 in words is "eighteen billion, twenty-eight million, forty-three thousand, five hundred forty-one".