19401128019 has 192 divisors, whose sum is σ = 38318658560. Its totient is φ = 9523422720.

The previous prime is 19401127937. The next prime is 19401128039. The reversal of 19401128019 is 91082110491.

It is not a de Polignac number, because 19401128019 - 2²⁹ = 18864257107 is a prime.

It is a super-2 number, since 2×19401128019² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19401128039) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 25628589 + ... + 25629345.

Almost surely, 2^19401128019 is an apocalyptic number.

19401128019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19401128019 is a deficient number, since it is larger than the sum of its proper divisors (18917530541).

19401128019 is a wasteful number, since it uses less digits than its factorization.

19401128019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 860 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The spelling of 19401128019 in words is "nineteen billion, four hundred one million, one hundred twenty-eight thousand, nineteen".