19968878 has 8 divisors (see below), whose sum is σ = 30986280. Its totient is φ = 9640120.

The previous prime is 19968877. The next prime is 19968889. The reversal of 19968878 is 87886991.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19968877) 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 3 ways as a sum of consecutive naturals, for example, 172088 + ... + 172203.

It is an arithmetic number, because the mean of its divisors is an integer number (3873285).

Almost surely, 2^19968878 is an apocalyptic number.

19968878 is a deficient number, since it is larger than the sum of its proper divisors (11017402).

19968878 is a wasteful number, since it uses less digits than its factorization.

19968878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344322.

The product of its digits is 1741824, while the sum is 56.

The square root of 19968878 is about 4468.6550549354. The cubic root of 19968878 is about 271.3008917232.

The spelling of 19968878 in words is "nineteen million, nine hundred sixty-eight thousand, eight hundred seventy-eight".