19478113 has 4 divisors (see below), whose sum is σ = 19495168. Its totient is φ = 19461060.

The previous prime is 19478099. The next prime is 19478119. The reversal of 19478113 is 31187491.

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 a de Polignac number, because none of the positive numbers 2^k-19478113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19478119) 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 3 ways as a sum of consecutive naturals, for example, 6681 + ... + 9142.

It is an arithmetic number, because the mean of its divisors is an integer number (4873792).

Almost surely, 2^19478113 is an apocalyptic number.

It is an amenable number.

19478113 is a deficient number, since it is larger than the sum of its proper divisors (17055).

19478113 is a wasteful number, since it uses less digits than its factorization.

19478113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17054.

The product of its digits is 6048, while the sum is 34.

The square root of 19478113 is about 4413.4015226353. The cubic root of 19478113 is about 269.0598900201.

It can be divided in two parts, 19478 and 113, that added together give a palindrome (19591).

The spelling of 19478113 in words is "nineteen million, four hundred seventy-eight thousand, one hundred thirteen".