18820294 has 8 divisors (see below), whose sum is σ = 28349280. Its totient is φ = 9370536.

The previous prime is 18820273. The next prime is 18820297. The reversal of 18820294 is 49202881.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18820297) 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, 19209 + ... + 20164.

It is an arithmetic number, because the mean of its divisors is an integer number (3543660).

Almost surely, 2^18820294 is an apocalyptic number.

18820294 is a deficient number, since it is larger than the sum of its proper divisors (9528986).

18820294 is a wasteful number, since it uses less digits than its factorization.

18820294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39614.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18820294 is about 4338.2362775672. The cubic root of 18820294 is about 265.9962217037.

The spelling of 18820294 in words is "eighteen million, eight hundred twenty thousand, two hundred ninety-four".