19847324847 has 16 divisors (see below), whose sum is σ = 30296712960. Its totient is φ = 11321389632.

The previous prime is 19847324839. The next prime is 19847324857. The reversal of 19847324847 is 74842374891.

It is not a de Polignac number, because 19847324847 - 2³ = 19847324839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19847324837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 818553 + ... + 842450.

It is an arithmetic number, because the mean of its divisors is an integer number (1893544560).

Almost surely, 2^19847324847 is an apocalyptic number.

19847324847 is a deficient number, since it is larger than the sum of its proper divisors (10449388113).

19847324847 is a wasteful number, since it uses less digits than its factorization.

19847324847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661582.

The product of its digits is 10838016, while the sum is 57.

The spelling of 19847324847 in words is "nineteen billion, eight hundred forty-seven million, three hundred twenty-four thousand, eight hundred forty-seven".