18868303 has 4 divisors (see below), whose sum is σ = 19688688. Its totient is φ = 18047920.

The previous prime is 18868301. The next prime is 18868309. The reversal of 18868303 is 30386881.

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

It is a cyclic number.

It is not a de Polignac number, because 18868303 - 2¹ = 18868301 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 (18868301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410158 + ... + 410203.

It is an arithmetic number, because the mean of its divisors is an integer number (4922172).

Almost surely, 2^18868303 is an apocalyptic number.

18868303 is a deficient number, since it is larger than the sum of its proper divisors (820385).

18868303 is an equidigital number, since it uses as much as digits as its factorization.

18868303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820384.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 18868303 is about 4343.7659927763. The cubic root of 18868303 is about 266.2222077127. Note that the first 4 decimals are identical.

The spelling of 18868303 in words is "eighteen million, eight hundred sixty-eight thousand, three hundred three".