19768851 has 6 divisors (see below), whose sum is σ = 28555020. Its totient is φ = 13179228.

The previous prime is 19768849. The next prime is 19768867. The reversal of 19768851 is 15886791.

It is not a de Polignac number, because 19768851 - 2¹ = 19768849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19768797 and 19768806.

It is not an unprimeable number, because it can be changed into a prime (19768871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1098261 + ... + 1098278.

It is an arithmetic number, because the mean of its divisors is an integer number (4759170).

Almost surely, 2^19768851 is an apocalyptic number.

19768851 is a deficient number, since it is larger than the sum of its proper divisors (8786169).

19768851 is a wasteful number, since it uses less digits than its factorization.

19768851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196545 (or 2196542 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 19768851 is about 4446.2176060108. The cubic root of 19768851 is about 270.3919820910.

The spelling of 19768851 in words is "nineteen million, seven hundred sixty-eight thousand, eight hundred fifty-one".