19713994 has 16 divisors (see below), whose sum is σ = 30244032. Its totient is φ = 9635328.

The previous prime is 19713961. The next prime is 19714003. The reversal of 19713994 is 49931791.

It is a happy number.

It is a super-3 number, since 3×19713994³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19713994.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16522 + ... + 17674.

It is an arithmetic number, because the mean of its divisors is an integer number (1890252).

Almost surely, 2^19713994 is an apocalyptic number.

19713994 is a deficient number, since it is larger than the sum of its proper divisors (10530038).

19713994 is a wasteful number, since it uses less digits than its factorization.

19713994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341.

The product of its digits is 61236, while the sum is 43.

The square root of 19713994 is about 4440.0443691477. The cubic root of 19713994 is about 270.1416449287.

The spelling of 19713994 in words is "nineteen million, seven hundred thirteen thousand, nine hundred ninety-four".