18030561 has 8 divisors (see below), whose sum is σ = 24816384. Its totient is φ = 11632560.

The previous prime is 18030497. The next prime is 18030569. The reversal of 18030561 is 16503081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18030561 - 2⁶ = 18030497 is a prime.

It is a super-2 number, since 2×18030561² = 650202259949442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18030569) 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 7 ways as a sum of consecutive naturals, for example, 96846 + ... + 97031.

It is an arithmetic number, because the mean of its divisors is an integer number (3102048).

Almost surely, 2^18030561 is an apocalyptic number.

It is an amenable number.

18030561 is a deficient number, since it is larger than the sum of its proper divisors (6785823).

18030561 is a wasteful number, since it uses less digits than its factorization.

18030561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193911.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 18030561 is about 4246.2408080560. The cubic root of 18030561 is about 262.2223749627. Note that the first 3 decimals are identical.

The spelling of 18030561 in words is "eighteen million, thirty thousand, five hundred sixty-one".