19682689568 has 12 divisors (see below), whose sum is σ = 38750295150. Its totient is φ = 9841344768.

The previous prime is 19682689567. The next prime is 19682689597. The reversal of 19682689568 is 86598628691.

It can be written as a sum of positive squares in only one way, i.e., 19469179024 + 213510544 = 139532^2 + 14612^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19682689498 and 19682689507.

It is not an unprimeable number, because it can be changed into a prime (19682689567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307541993 + ... + 307542056.

Almost surely, 2^19682689568 is an apocalyptic number.

It is an amenable number.

19682689568 is a deficient number, since it is larger than the sum of its proper divisors (19067605582).

19682689568 is an equidigital number, since it uses as much as digits as its factorization.

19682689568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615084059 (or 615084051 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 68.

The spelling of 19682689568 in words is "nineteen billion, six hundred eighty-two million, six hundred eighty-nine thousand, five hundred sixty-eight".