18545441 has 4 divisors (see below), whose sum is σ = 18648084. Its totient is φ = 18442800.

The previous prime is 18545381. The next prime is 18545467. The reversal of 18545441 is 14454581.

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 355216 + 18190225 = 596^2 + 4265^2 .

It is a cyclic number.

It is not a de Polignac number, because 18545441 - 2¹⁸ = 18283297 is a prime.

It is a super-3 number, since 3×18545441³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18545398 and 18545407.

It is not an unprimeable number, because it can be changed into a prime (18545041) 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 in 3 ways as a sum of consecutive naturals, for example, 51050 + ... + 51411.

It is an arithmetic number, because the mean of its divisors is an integer number (4662021).

Almost surely, 2^18545441 is an apocalyptic number.

It is an amenable number.

18545441 is a deficient number, since it is larger than the sum of its proper divisors (102643).

18545441 is a wasteful number, since it uses less digits than its factorization.

18545441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102642.

The product of its digits is 12800, while the sum is 32.

The square root of 18545441 is about 4306.4418026951. The cubic root of 18545441 is about 264.6949902398.

The spelling of 18545441 in words is "eighteen million, five hundred forty-five thousand, four hundred forty-one".