19878963 has 12 divisors (see below), whose sum is σ = 28701720. Its totient is φ = 12232896.

The previous prime is 19878941. The next prime is 19878983. The reversal of 19878963 is 36987891.

It is not a de Polignac number, because 19878963 - 2⁹ = 19878451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19878913) 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 11 ways as a sum of consecutive naturals, for example, 19098 + ... + 20111.

It is an arithmetic number, because the mean of its divisors is an integer number (2391810).

Almost surely, 2^19878963 is an apocalyptic number.

19878963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19878963 is a deficient number, since it is larger than the sum of its proper divisors (8822757).

19878963 is a wasteful number, since it uses less digits than its factorization.

19878963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39238 (or 39225 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The square root of 19878963 is about 4458.5830708870. The cubic root of 19878963 is about 270.8930783750.

The spelling of 19878963 in words is "nineteen million, eight hundred seventy-eight thousand, nine hundred sixty-three".