19110013 has 12 divisors (see below), whose sum is σ = 20990100. Its totient is φ = 17387136.

The previous prime is 19110011. The next prime is 19110031. The reversal of 19110013 is 31001191.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3452164 + 15657849 = 1858^2 + 3957^2 .

It is not a de Polignac number, because 19110013 - 2¹ = 19110011 is a prime.

It is the 4372-nd Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19110011) by changing a digit.

It is a nontrivial repunit in base 4371.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11563 + ... + 13111.

It is an arithmetic number, because the mean of its divisors is an integer number (1749175).

Almost surely, 2^19110013 is an apocalyptic number.

19110013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19110013 is a deficient number, since it is larger than the sum of its proper divisors (1880087).

19110013 is a wasteful number, since it uses less digits than its factorization.

19110013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648 (or 1635 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 19110013 is about 4371.5000857829. The cubic root of 19110013 is about 267.3541896127.

The spelling of 19110013 in words is "nineteen million, one hundred ten thousand, thirteen".