18889113 has 4 divisors (see below), whose sum is σ = 25185488. Its totient is φ = 12592740.

The previous prime is 18889099. The next prime is 18889133. The reversal of 18889113 is 31198881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18889113 - 2⁵ = 18889081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18889133) 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, 3148183 + ... + 3148188.

It is an arithmetic number, because the mean of its divisors is an integer number (6296372).

Almost surely, 2^18889113 is an apocalyptic number.

It is an amenable number.

18889113 is a deficient number, since it is larger than the sum of its proper divisors (6296375).

18889113 is an equidigital number, since it uses as much as digits as its factorization.

18889113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6296374.

The product of its digits is 13824, while the sum is 39.

The square root of 18889113 is about 4346.1607195317. The cubic root of 18889113 is about 266.3200446098.

The spelling of 18889113 in words is "eighteen million, eight hundred eighty-nine thousand, one hundred thirteen".