18739113 has 4 divisors (see below), whose sum is σ = 24985488. Its totient is φ = 12492740.

The previous prime is 18739109. The next prime is 18739177. The reversal of 18739113 is 31193781.

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 a cyclic number.

It is not a de Polignac number, because 18739113 - 2² = 18739109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18739103) 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, 3123183 + ... + 3123188.

It is an arithmetic number, because the mean of its divisors is an integer number (6246372).

Almost surely, 2^18739113 is an apocalyptic number.

It is an amenable number.

18739113 is a deficient number, since it is larger than the sum of its proper divisors (6246375).

18739113 is an equidigital number, since it uses as much as digits as its factorization.

18739113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6246374.

The product of its digits is 4536, while the sum is 33.

The square root of 18739113 is about 4328.8697139092. The cubic root of 18739113 is about 265.6132138346.

The spelling of 18739113 in words is "eighteen million, seven hundred thirty-nine thousand, one hundred thirteen".