19961289170 has 8 divisors (see below), whose sum is σ = 35930320524. Its totient is φ = 7984515664.

The previous prime is 19961289149. The next prime is 19961289203. The reversal of 19961289170 is 7198216991.

19961289170 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 18573056089 + 1388233081 = 136283^2 + 37259^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998064449 + ... + 998064468.

Almost surely, 2^19961289170 is an apocalyptic number.

19961289170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19961289170 is a deficient number, since it is larger than the sum of its proper divisors (15969031354).

19961289170 is a wasteful number, since it uses less digits than its factorization.

19961289170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996128924.

The product of its (nonzero) digits is 489888, while the sum is 53.

The spelling of 19961289170 in words is "nineteen billion, nine hundred sixty-one million, two hundred eighty-nine thousand, one hundred seventy".