19111002312 has 128 divisors (see below), whose sum is σ = 51344213760. Its totient is φ = 5912248320.

The previous prime is 19111002301. The next prime is 19111002343. The reversal of 19111002312 is 21320011191.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8842512 + ... + 8844672.

It is an arithmetic number, because the mean of its divisors is an integer number (401126670).

Almost surely, 2^19111002312 is an apocalyptic number.

19111002312 is a gapful number since it is divisible by the number (12) 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 19111002312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25672106880).

19111002312 is an abundant number, since it is smaller than the sum of its proper divisors (32233211448).

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

19111002312 is a wasteful number, since it uses less digits than its factorization.

19111002312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663 (or 2659 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 21.

The spelling of 19111002312 in words is "nineteen billion, one hundred eleven million, two thousand, three hundred twelve".