19178047823 has 6 divisors (see below), whose sum is σ = 21080003112. Its totient is φ = 17434588820.

The previous prime is 19178047771. The next prime is 19178047853. The reversal of 19178047823 is 32874087191.

It is a happy number.

It is not a de Polignac number, because 19178047823 - 2²² = 19173853519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19178047853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79248011 + ... + 79248252.

It is an arithmetic number, because the mean of its divisors is an integer number (3513333852).

Almost surely, 2^19178047823 is an apocalyptic number.

19178047823 is a deficient number, since it is larger than the sum of its proper divisors (1901955289).

19178047823 is a wasteful number, since it uses less digits than its factorization.

19178047823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158496285 (or 158496274 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 19178047823 in words is "nineteen billion, one hundred seventy-eight million, forty-seven thousand, eight hundred twenty-three".