19716413 has 4 divisors (see below), whose sum is σ = 20876220. Its totient is φ = 18556608.

The previous prime is 19716383. The next prime is 19716421. The reversal of 19716413 is 31461791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5299204 + 14417209 = 2302^2 + 3797^2 .

It is a cyclic number.

It is not a de Polignac number, because 19716413 - 2⁶ = 19716349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19716413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19716493) 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, 579878 + ... + 579911.

It is an arithmetic number, because the mean of its divisors is an integer number (5219055).

Almost surely, 2^19716413 is an apocalyptic number.

It is an amenable number.

19716413 is a deficient number, since it is larger than the sum of its proper divisors (1159807).

19716413 is a wasteful number, since it uses less digits than its factorization.

19716413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159806.

The product of its digits is 4536, while the sum is 32.

The square root of 19716413 is about 4440.3167679795. The cubic root of 19716413 is about 270.1526936945.

The spelling of 19716413 in words is "nineteen million, seven hundred sixteen thousand, four hundred thirteen".