19981713 has 8 divisors (see below), whose sum is σ = 27262048. Its totient is φ = 13011264.

The previous prime is 19981697. The next prime is 19981723. The reversal of 19981713 is 31718991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19981713 - 2⁴ = 19981697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19981723) 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 7 ways as a sum of consecutive naturals, for example, 77320 + ... + 77577.

It is an arithmetic number, because the mean of its divisors is an integer number (3407756).

Almost surely, 2^19981713 is an apocalyptic number.

It is an amenable number.

19981713 is a deficient number, since it is larger than the sum of its proper divisors (7280335).

19981713 is a wasteful number, since it uses less digits than its factorization.

19981713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154943.

The product of its digits is 13608, while the sum is 39.

The square root of 19981713 is about 4470.0909386723. The cubic root of 19981713 is about 271.3590055067.

The spelling of 19981713 in words is "nineteen million, nine hundred eighty-one thousand, seven hundred thirteen".