18530609927 has 4 divisors (see below), whose sum is σ = 18559429560. Its totient is φ = 18501790296.

The previous prime is 18530609899. The next prime is 18530609947. The reversal of 18530609927 is 72990603581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72990603581 = 7 ⋅10427229083.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18530609927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18530609947) 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, 14408852 + ... + 14410137.

It is an arithmetic number, because the mean of its divisors is an integer number (4639857390).

Almost surely, 2^18530609927 is an apocalyptic number.

18530609927 is a deficient number, since it is larger than the sum of its proper divisors (28819633).

18530609927 is an equidigital number, since it uses as much as digits as its factorization.

18530609927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28819632.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 18530609927 in words is "eighteen billion, five hundred thirty million, six hundred nine thousand, nine hundred twenty-seven".