18450490427 has 4 divisors (see below), whose sum is σ = 18452560656. Its totient is φ = 18448420200.

The previous prime is 18450490397. The next prime is 18450490489. The reversal of 18450490427 is 72409405481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18450490427 - 2⁶ = 18450490363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18450493427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021688 + ... + 1039589.

It is an arithmetic number, because the mean of its divisors is an integer number (4613140164).

Almost surely, 2^18450490427 is an apocalyptic number.

18450490427 is a deficient number, since it is larger than the sum of its proper divisors (2070229).

18450490427 is an equidigital number, since it uses as much as digits as its factorization.

18450490427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070228.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 18450490427 in words is "eighteen billion, four hundred fifty million, four hundred ninety thousand, four hundred twenty-seven".