18005741 has 4 divisors (see below), whose sum is σ = 19390812. Its totient is φ = 16620672.

The previous prime is 18005731. The next prime is 18005753. The reversal of 18005741 is 14750081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10465225 + 7540516 = 3235^2 + 2746^2 .

It is a cyclic number.

It is not a de Polignac number, because 18005741 - 2¹⁴ = 17989357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18005741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18005731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692516 + ... + 692541.

It is an arithmetic number, because the mean of its divisors is an integer number (4847703).

Almost surely, 2^18005741 is an apocalyptic number.

It is an amenable number.

18005741 is a deficient number, since it is larger than the sum of its proper divisors (1385071).

18005741 is a wasteful number, since it uses less digits than its factorization.

18005741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385070.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 18005741 is about 4243.3172165182. The cubic root of 18005741 is about 262.1019988228.

The spelling of 18005741 in words is "eighteen million, five thousand, seven hundred forty-one".