19261352768 has 84 divisors (see below), whose sum is σ = 45025421760. Its totient is φ = 8150268672.

The previous prime is 19261352743. The next prime is 19261352779. The reversal of 19261352768 is 86725316291.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208871 + ... + 286617.

Almost surely, 2^19261352768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19261352768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22512710880).

19261352768 is an abundant number, since it is smaller than the sum of its proper divisors (25764068992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19261352768 is an equidigital number, since it uses as much as digits as its factorization.

19261352768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77852 (or 77835 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The spelling of 19261352768 in words is "nineteen billion, two hundred sixty-one million, three hundred fifty-two thousand, seven hundred sixty-eight".