19688942863 has 4 divisors (see below), whose sum is σ = 19695467560. Its totient is φ = 19682418168.

The previous prime is 19688942851. The next prime is 19688942881. The reversal of 19688942863 is 36824988691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19688942863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19688942795 and 19688942804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19688942843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3257820 + ... + 3263857.

It is an arithmetic number, because the mean of its divisors is an integer number (4923866890).

Almost surely, 2^19688942863 is an apocalyptic number.

19688942863 is a deficient number, since it is larger than the sum of its proper divisors (6524697).

19688942863 is an equidigital number, since it uses as much as digits as its factorization.

19688942863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6524696.

The product of its digits is 35831808, while the sum is 64.

The spelling of 19688942863 in words is "nineteen billion, six hundred eighty-eight million, nine hundred forty-two thousand, eight hundred sixty-three".