19011240000 has 560 divisors, whose sum is σ = 72366835200. Its totient is φ = 4886784000.

The previous prime is 19011239977. The next prime is 19011240007. The reversal of 19011240000 is 4211091.

It is a super-2 number, since 2×19011240000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (19011240007) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 31319697 + ... + 31320303.

Almost surely, 2^19011240000 is an apocalyptic number.

19011240000 is a gapful number since it is divisible by the number (10) 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 19011240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36183417600).

19011240000 is an abundant number, since it is smaller than the sum of its proper divisors (53355595200).

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

19011240000 is an equidigital number, since it uses as much as digits as its factorization.

19011240000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 19011240000 its reverse (4211091), we get a palindrome (19015451091).

The spelling of 19011240000 in words is "nineteen billion, eleven million, two hundred forty thousand".