19997714 has 16 divisors (see below), whose sum is σ = 33064416. Its totient is φ = 8995200.

The previous prime is 19997713. The next prime is 19997717. The reversal of 19997714 is 41779991.

It is not an unprimeable number, because it can be changed into a prime (19997711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2552 + ... + 6819.

It is an arithmetic number, because the mean of its divisors is an integer number (2066526).

Almost surely, 2^19997714 is an apocalyptic number.

19997714 is a deficient number, since it is larger than the sum of its proper divisors (13066702).

19997714 is a wasteful number, since it uses less digits than its factorization.

19997714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9481.

The product of its digits is 142884, while the sum is 47.

The square root of 19997714 is about 4471.8803651261. The cubic root of 19997714 is about 271.4314193343.

It can be divided in two parts, 199977 and 14, that added together give a palindrome (199991).

The spelling of 19997714 in words is "nineteen million, nine hundred ninety-seven thousand, seven hundred fourteen".