19011222828 has 48 divisors (see below), whose sum is σ = 53079771360. Its totient is φ = 5849606592.

The previous prime is 19011222827. The next prime is 19011222869. The reversal of 19011222828 is 82822211091.

It is a super-2 number, since 2×19011222828² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 19011222792 and 19011222801.

It is not an unprimeable number, because it can be changed into a prime (19011222827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6768975 + ... + 6771782.

It is an arithmetic number, because the mean of its divisors is an integer number (1105828570).

Almost surely, 2^19011222828 is an apocalyptic number.

19011222828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19011222828 is an abundant number, since it is smaller than the sum of its proper divisors (34068548532).

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

19011222828 is a wasteful number, since it uses less digits than its factorization.

19011222828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13540783 (or 13540775 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 19011222828 in words is "nineteen billion, eleven million, two hundred twenty-two thousand, eight hundred twenty-eight".