18091741 has 2 divisors, whose sum is σ = 18091742. Its totient is φ = 18091740.

The previous prime is 18091727. The next prime is 18091747. The reversal of 18091741 is 14719081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18062500 + 29241 = 4250^2 + 171^2 .

It is a cyclic number.

It is not a de Polignac number, because 18091741 - 2⁷ = 18091613 is a prime.

It is a super-2 number, since 2×18091741² = 654622184822162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18091747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9045870 + 9045871.

It is an arithmetic number, because the mean of its divisors is an integer number (9045871).

Almost surely, 2^18091741 is an apocalyptic number.

It is an amenable number.

18091741 is a deficient number, since it is larger than the sum of its proper divisors (1).

18091741 is an equidigital number, since it uses as much as digits as its factorization.

18091741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 18091741 is about 4253.4387264894. The cubic root of 18091741 is about 262.5186248312.

The spelling of 18091741 in words is "eighteen million, ninety-one thousand, seven hundred forty-one".