18550063 has 4 divisors (see below), whose sum is σ = 21200080. Its totient is φ = 15900048.

The previous prime is 18550033. The next prime is 18550067. The reversal of 18550063 is 36005581.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18550063 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 (18550067) 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, 1324998 + ... + 1325011.

It is an arithmetic number, because the mean of its divisors is an integer number (5300020).

Almost surely, 2^18550063 is an apocalyptic number.

18550063 is a deficient number, since it is larger than the sum of its proper divisors (2650017).

18550063 is an equidigital number, since it uses as much as digits as its factorization.

18550063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650016.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 18550063 is about 4306.9784071899. The cubic root of 18550063 is about 264.7169780089.

The spelling of 18550063 in words is "eighteen million, five hundred fifty thousand, sixty-three".