19986113 has 4 divisors (see below), whose sum is σ = 22841280. Its totient is φ = 17130948.

The previous prime is 19986091. The next prime is 19986121. The reversal of 19986113 is 31168991.

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 19986113 - 2¹⁸ = 19723969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19986193) 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, 1427573 + ... + 1427586.

It is an arithmetic number, because the mean of its divisors is an integer number (5710320).

Almost surely, 2^19986113 is an apocalyptic number.

It is an amenable number.

19986113 is a deficient number, since it is larger than the sum of its proper divisors (2855167).

19986113 is an equidigital number, since it uses as much as digits as its factorization.

19986113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855166.

The product of its digits is 11664, while the sum is 38.

The square root of 19986113 is about 4470.5830715914. The cubic root of 19986113 is about 271.3789219173.

The spelling of 19986113 in words is "nineteen million, nine hundred eighty-six thousand, one hundred thirteen".