18515041 has 2 divisors, whose sum is σ = 18515042. Its totient is φ = 18515040.

The previous prime is 18515027. The next prime is 18515047. The reversal of 18515041 is 14051581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12285025 + 6230016 = 3505^2 + 2496^2 .

It is an emirp because it is prime and its reverse (14051581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18515041 - 2⁵ = 18515009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18514997 and 18515015.

It is not a weakly prime, because it can be changed into another prime (18515047) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9257520 + 9257521.

It is an arithmetic number, because the mean of its divisors is an integer number (9257521).

Almost surely, 2^18515041 is an apocalyptic number.

It is an amenable number.

18515041 is a deficient number, since it is larger than the sum of its proper divisors (1).

18515041 is an equidigital number, since it uses as much as digits as its factorization.

18515041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 18515041 is about 4302.9107590095. The cubic root of 18515041 is about 264.5502803083.

The spelling of 18515041 in words is "eighteen million, five hundred fifteen thousand, forty-one".