19130913 has 6 divisors (see below), whose sum is σ = 27633554. Its totient is φ = 12753936.

The previous prime is 19130869. The next prime is 19130939. The reversal of 19130913 is 31903191.

It can be written as a sum of positive squares in only one way, i.e., 16916769 + 2214144 = 4113^2 + 1488^2 .

It is not a de Polignac number, because 19130913 - 2¹⁰ = 19129889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19130953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1062820 + ... + 1062837.

Almost surely, 2^19130913 is an apocalyptic number.

It is an amenable number.

19130913 is a deficient number, since it is larger than the sum of its proper divisors (8502641).

19130913 is a wasteful number, since it uses less digits than its factorization.

19130913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125663 (or 2125660 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 19130913 is about 4373.8899163102. The cubic root of 19130913 is about 267.4516196313.

The spelling of 19130913 in words is "nineteen million, one hundred thirty thousand, nine hundred thirteen".