18550113 has 4 divisors (see below), whose sum is σ = 24733488. Its totient is φ = 12366740.

The previous prime is 18550109. The next prime is 18550117. The reversal of 18550113 is 31105581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (18550109) and next prime (18550117).

It is a cyclic number.

It is not a de Polignac number, because 18550113 - 2² = 18550109 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18550117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3091683 + ... + 3091688.

It is an arithmetic number, because the mean of its divisors is an integer number (6183372).

Almost surely, 2^18550113 is an apocalyptic number.

It is an amenable number.

18550113 is a deficient number, since it is larger than the sum of its proper divisors (6183375).

18550113 is an equidigital number, since it uses as much as digits as its factorization.

18550113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6183374.

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 18550113 is about 4306.9842117194. The cubic root of 18550113 is about 264.7172158488.

Adding to 18550113 its reverse (31105581), we get a palindrome (49655694).

The spelling of 18550113 in words is "eighteen million, five hundred fifty thousand, one hundred thirteen".