19444878423 has 12 divisors (see below), whose sum is σ = 28090350288. Its totient is φ = 12961727520.

The previous prime is 19444878391. The next prime is 19444878451. The reversal of 19444878423 is 32487844491.

19444878423 is a `hidden beast` number, since 1 + 94 + 448 + 78 + 42 + 3 = 666.

It is not a de Polignac number, because 19444878423 - 2⁵ = 19444878391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19444878423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19444878223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43398 + ... + 201923.

It is an arithmetic number, because the mean of its divisors is an integer number (2340862524).

Almost surely, 2^19444878423 is an apocalyptic number.

19444878423 is a deficient number, since it is larger than the sum of its proper divisors (8645471865).

19444878423 is a wasteful number, since it uses less digits than its factorization.

19444878423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254134 (or 254131 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The spelling of 19444878423 in words is "nineteen billion, four hundred forty-four million, eight hundred seventy-eight thousand, four hundred twenty-three".