18093541 has 2 divisors, whose sum is σ = 18093542. Its totient is φ = 18093540.

The previous prime is 18093539. The next prime is 18093547. The reversal of 18093541 is 14539081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18028516 + 65025 = 4246^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 18093541 - 2¹ = 18093539 is a prime.

Together with 18093539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18093547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9046770 + 9046771.

It is an arithmetic number, because the mean of its divisors is an integer number (9046771).

Almost surely, 2^18093541 is an apocalyptic number.

It is an amenable number.

18093541 is a deficient number, since it is larger than the sum of its proper divisors (1).

18093541 is an equidigital number, since it uses as much as digits as its factorization.

18093541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 18093541 is about 4253.6503147297. The cubic root of 18093541 is about 262.5273307900.

The spelling of 18093541 in words is "eighteen million, ninety-three thousand, five hundred forty-one".