18075569 has 2 divisors, whose sum is σ = 18075570. Its totient is φ = 18075568.

The previous prime is 18075557. The next prime is 18075583. The reversal of 18075569 is 96557081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17977600 + 97969 = 4240^2 + 313^2 .

It is an emirp because it is prime and its reverse (96557081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18075569 is a prime.

It is a super-2 number, since 2×18075569² = 653452389347522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18075469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9037784 + 9037785.

It is an arithmetic number, because the mean of its divisors is an integer number (9037785).

Almost surely, 2^18075569 is an apocalyptic number.

It is an amenable number.

18075569 is a deficient number, since it is larger than the sum of its proper divisors (1).

18075569 is an equidigital number, since it uses as much as digits as its factorization.

18075569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 18075569 is about 4251.5372513951. The cubic root of 18075569 is about 262.4403807157.

The spelling of 18075569 in words is "eighteen million, seventy-five thousand, five hundred sixty-nine".