18109141 has 2 divisors, whose sum is σ = 18109142. Its totient is φ = 18109140.

The previous prime is 18109129. The next prime is 18109153. The reversal of 18109141 is 14190181.

It is a balanced prime because it is at equal distance from previous prime (18109129) and next prime (18109153).

It can be written as a sum of positive squares in only one way, i.e., 15046641 + 3062500 = 3879^2 + 1750^2 .

It is an emirp because it is prime and its reverse (14190181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18109141 - 2¹¹ = 18107093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18109111) 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, 9054570 + 9054571.

It is an arithmetic number, because the mean of its divisors is an integer number (9054571).

Almost surely, 2^18109141 is an apocalyptic number.

It is an amenable number.

18109141 is a deficient number, since it is larger than the sum of its proper divisors (1).

18109141 is an equidigital number, since it uses as much as digits as its factorization.

18109141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 18109141 is about 4255.4836387889. The cubic root of 18109141 is about 262.6027582573.

It can be divided in two parts, 181091 and 41, that multiplied together give a triangular number (7424731 = T₃₈₅₃).

The spelling of 18109141 in words is "eighteen million, one hundred nine thousand, one hundred forty-one".