19768850857 has 8 divisors (see below), whose sum is σ = 22666567616. Its totient is φ = 16889532912.

The previous prime is 19768850851. The next prime is 19768850887. The reversal of 19768850857 is 75805886791.

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

It is not a de Polignac number, because 19768850857 - 2⁷ = 19768850729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19768850851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4597398 + ... + 4601695.

It is an arithmetic number, because the mean of its divisors is an integer number (2833320952).

Almost surely, 2^19768850857 is an apocalyptic number.

It is an amenable number.

19768850857 is a deficient number, since it is larger than the sum of its proper divisors (2897716759).

19768850857 is an equidigital number, since it uses as much as digits as its factorization.

19768850857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9199407.

The product of its (nonzero) digits is 33868800, while the sum is 64.

The spelling of 19768850857 in words is "nineteen billion, seven hundred sixty-eight million, eight hundred fifty thousand, eight hundred fifty-seven".