18873914 has 4 divisors (see below), whose sum is σ = 28310874. Its totient is φ = 9436956.

The previous prime is 18873913. The next prime is 18873919. The reversal of 18873914 is 41937881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41937881 = 181 ⋅231701.

It can be written as a sum of positive squares in only one way, i.e., 14691889 + 4182025 = 3833^2 + 2045^2 .

It is not an unprimeable number, because it can be changed into a prime (18873913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4718477 + ... + 4718480.

Almost surely, 2^18873914 is an apocalyptic number.

18873914 is a deficient number, since it is larger than the sum of its proper divisors (9436960).

18873914 is an equidigital number, since it uses as much as digits as its factorization.

18873914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9436959.

The product of its digits is 48384, while the sum is 41.

The square root of 18873914 is about 4344.4118128925. The cubic root of 18873914 is about 266.2485945542.

The spelling of 18873914 in words is "eighteen million, eight hundred seventy-three thousand, nine hundred fourteen".