19146857047 has 4 divisors (see below), whose sum is σ = 19284604360. Its totient is φ = 19009109736.

The previous prime is 19146857027. The next prime is 19146857057. The reversal of 19146857047 is 74075864191.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19146857047 - 2⁷ = 19146856919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19146856985 and 19146857003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19146857027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68873448 + ... + 68873725.

It is an arithmetic number, because the mean of its divisors is an integer number (4821151090).

Almost surely, 2^19146857047 is an apocalyptic number.

19146857047 is a deficient number, since it is larger than the sum of its proper divisors (137747313).

19146857047 is a wasteful number, since it uses less digits than its factorization.

19146857047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137747312.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 19146857047 in words is "nineteen billion, one hundred forty-six million, eight hundred fifty-seven thousand, forty-seven".