19126811268 has 72 divisors (see below), whose sum is σ = 49323980160. Its totient is φ = 6248027520.

The previous prime is 19126811267. The next prime is 19126811273. The reversal of 19126811268 is 86211862191.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19126811267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404448 + ... + 449256.

It is an arithmetic number, because the mean of its divisors is an integer number (685055280).

Almost surely, 2^19126811268 is an apocalyptic number.

19126811268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19126811268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24661990080).

19126811268 is an abundant number, since it is smaller than the sum of its proper divisors (30197168892).

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

19126811268 is a wasteful number, since it uses less digits than its factorization.

19126811268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45057 (or 45052 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The spelling of 19126811268 in words is "nineteen billion, one hundred twenty-six million, eight hundred eleven thousand, two hundred sixty-eight".