18648093 has 4 divisors (see below), whose sum is σ = 24864128. Its totient is φ = 12432060.

The previous prime is 18648089. The next prime is 18648107. The reversal of 18648093 is 39084681.

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 not a de Polignac number, because 18648093 - 2² = 18648089 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 (18648013) 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, 3108013 + ... + 3108018.

It is an arithmetic number, because the mean of its divisors is an integer number (6216032).

Almost surely, 2^18648093 is an apocalyptic number.

It is an amenable number.

18648093 is a deficient number, since it is larger than the sum of its proper divisors (6216035).

18648093 is an equidigital number, since it uses as much as digits as its factorization.

18648093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216034.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 18648093 is about 4318.3437797378. The cubic root of 18648093 is about 265.1824683737.

The spelling of 18648093 in words is "eighteen million, six hundred forty-eight thousand, ninety-three".