18545069 has 2 divisors, whose sum is σ = 18545070. Its totient is φ = 18545068.

The previous prime is 18545053. The next prime is 18545077. The reversal of 18545069 is 96054581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17952169 + 592900 = 4237^2 + 770^2 .

It is a cyclic number.

It is not a de Polignac number, because 18545069 - 2⁴ = 18545053 is a prime.

It is a super-2 number, since 2×18545069² = 687839168429522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18545269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9272534 + 9272535.

It is an arithmetic number, because the mean of its divisors is an integer number (9272535).

Almost surely, 2^18545069 is an apocalyptic number.

It is an amenable number.

18545069 is a deficient number, since it is larger than the sum of its proper divisors (1).

18545069 is an equidigital number, since it uses as much as digits as its factorization.

18545069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 18545069 is about 4306.3986113689. The cubic root of 18545069 is about 264.6932204033.

It can be divided in two parts, 185 and 45069, that added together give a palindrome (45254).

The spelling of 18545069 in words is "eighteen million, five hundred forty-five thousand, sixty-nine".