18933349 has 8 divisors (see below), whose sum is σ = 19763352. Its totient is φ = 18120960.

The previous prime is 18933337. The next prime is 18933391. The reversal of 18933349 is 94333981.

It can be written as a sum of positive squares in 4 ways, for example, as 4870849 + 14062500 = 2207^2 + 3750^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18933349 - 2⁷ = 18933221 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 (18933319) 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 7 ways as a sum of consecutive naturals, for example, 2184 + ... + 6529.

It is an arithmetic number, because the mean of its divisors is an integer number (2470419).

Almost surely, 2^18933349 is an apocalyptic number.

It is an amenable number.

18933349 is a deficient number, since it is larger than the sum of its proper divisors (830003).

18933349 is an equidigital number, since it uses as much as digits as its factorization.

18933349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8807.

The product of its digits is 69984, while the sum is 40.

The square root of 18933349 is about 4351.2468328055. The cubic root of 18933349 is about 266.5277788910.

The spelling of 18933349 in words is "eighteen million, nine hundred thirty-three thousand, three hundred forty-nine".