18873903 has 4 divisors (see below), whose sum is σ = 25165208. Its totient is φ = 12582600.

The previous prime is 18873889. The next prime is 18873913. The reversal of 18873903 is 30937881.

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

It is not a de Polignac number, because 18873903 - 2⁴ = 18873887 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 (18873913) 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, 3145648 + ... + 3145653.

It is an arithmetic number, because the mean of its divisors is an integer number (6291302).

Almost surely, 2^18873903 is an apocalyptic number.

18873903 is a deficient number, since it is larger than the sum of its proper divisors (6291305).

18873903 is an equidigital number, since it uses as much as digits as its factorization.

18873903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6291304.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 18873903 is about 4344.4105468982. The cubic root of 18873903 is about 266.2485428296.

The spelling of 18873903 in words is "eighteen million, eight hundred seventy-three thousand, nine hundred three".