19679913 has 24 divisors (see below), whose sum is σ = 31258656. Its totient is φ = 11832000.

The previous prime is 19679911. The next prime is 19679921. The reversal of 19679913 is 31997691.

It is not a de Polignac number, because 19679913 - 2¹ = 19679911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19679911) 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 23 ways as a sum of consecutive naturals, for example, 12838 + ... + 14288.

It is an arithmetic number, because the mean of its divisors is an integer number (1302444).

Almost surely, 2^19679913 is an apocalyptic number.

It is an amenable number.

19679913 is a deficient number, since it is larger than the sum of its proper divisors (11578743).

19679913 is a wasteful number, since it uses less digits than its factorization.

19679913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605 (or 1602 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 19679913 is about 4436.2047968957. The cubic root of 19679913 is about 269.9858840357.

The spelling of 19679913 in words is "nineteen million, six hundred seventy-nine thousand, nine hundred thirteen".