19111235136 has 224 divisors, whose sum is σ = 59882422272. Its totient is φ = 5263902720.

The previous prime is 19111235123. The next prime is 19111235137. The reversal of 19111235136 is 63153211191.

It is a tau number, because it is divible by the number of its divisors (224).

It is a junction number, because it is equal to n+sod(n) for n = 19111235097 and 19111235106.

It is not an unprimeable number, because it can be changed into a prime (19111235137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13206765 + ... + 13208211.

Almost surely, 2^19111235136 is an apocalyptic number.

19111235136 is a gapful number since it is divisible by the number (16) 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 19111235136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29941211136).

19111235136 is an abundant number, since it is smaller than the sum of its proper divisors (40771187136).

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

19111235136 is a wasteful number, since it uses less digits than its factorization.

19111235136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817 (or 1807 counting only the distinct ones).

The product of its digits is 4860, while the sum is 33.

The spelling of 19111235136 in words is "nineteen billion, one hundred eleven million, two hundred thirty-five thousand, one hundred thirty-six".