18249941 has 2 divisors, whose sum is σ = 18249942. Its totient is φ = 18249940.

The previous prime is 18249923. The next prime is 18249947. The reversal of 18249941 is 14994281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15288100 + 2961841 = 3910^2 + 1721^2 .

It is a cyclic number.

It is not a de Polignac number, because 18249941 - 2⁶ = 18249877 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18249895 and 18249904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18249947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9124970 + 9124971.

It is an arithmetic number, because the mean of its divisors is an integer number (9124971).

Almost surely, 2^18249941 is an apocalyptic number.

It is an amenable number.

18249941 is a deficient number, since it is larger than the sum of its proper divisors (1).

18249941 is an equidigital number, since it uses as much as digits as its factorization.

18249941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 18249941 is about 4271.9949672255. The cubic root of 18249941 is about 263.2815876890.

The spelling of 18249941 in words is "eighteen million, two hundred forty-nine thousand, nine hundred forty-one".