19968494 has 16 divisors (see below), whose sum is σ = 36865248. Its totient is φ = 7899552.

The previous prime is 19968457. The next prime is 19968497. The reversal of 19968494 is 49486991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19968497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54677 + ... + 55040.

It is an arithmetic number, because the mean of its divisors is an integer number (2304078).

Almost surely, 2^19968494 is an apocalyptic number.

19968494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19968494 is a deficient number, since it is larger than the sum of its proper divisors (16896754).

19968494 is a wasteful number, since it uses less digits than its factorization.

19968494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109739.

The product of its digits is 559872, while the sum is 50.

The square root of 19968494 is about 4468.6120887810. The cubic root of 19968494 is about 271.2991526802.

The spelling of 19968494 in words is "nineteen million, nine hundred sixty-eight thousand, four hundred ninety-four".