19718713 has 16 divisors (see below), whose sum is σ = 23886720. Its totient is φ = 15901056.

The previous prime is 19718701. The next prime is 19718717. The reversal of 19718713 is 31781791.

It is a cyclic number.

It is not a de Polignac number, because 19718713 - 2¹³ = 19710521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19718717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22581 + ... + 23437.

It is an arithmetic number, because the mean of its divisors is an integer number (1492920).

Almost surely, 2^19718713 is an apocalyptic number.

It is an amenable number.

19718713 is a deficient number, since it is larger than the sum of its proper divisors (4168007).

19718713 is a wasteful number, since it uses less digits than its factorization.

19718713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056.

The product of its digits is 10584, while the sum is 37.

The square root of 19718713 is about 4440.5757509584. The cubic root of 19718713 is about 270.1631980906.

The spelling of 19718713 in words is "nineteen million, seven hundred eighteen thousand, seven hundred thirteen".