19123427544 has 192 divisors, whose sum is σ = 53821324800. Its totient is φ = 5652960768.

The previous prime is 19123427527. The next prime is 19123427623. The reversal of 19123427544 is 44572432191.

It is a junction number, because it is equal to n+sod(n) for n = 19123427496 and 19123427505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43167787 + ... + 43168229.

It is an arithmetic number, because the mean of its divisors is an integer number (280319400).

Almost surely, 2^19123427544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19123427544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26910662400).

19123427544 is an abundant number, since it is smaller than the sum of its proper divisors (34697897256).

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

19123427544 is a wasteful number, since it uses less digits than its factorization.

19123427544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 857 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The spelling of 19123427544 in words is "nineteen billion, one hundred twenty-three million, four hundred twenty-seven thousand, five hundred forty-four".