19845734847 has 8 divisors (see below), whose sum is σ = 26492979456. Its totient is φ = 13214490072.

The previous prime is 19845734827. The next prime is 19845734863. The reversal of 19845734847 is 74843754891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19845734847 - 2³⁴ = 2665865663 is a prime.

It is a super-2 number, since 2×19845734847² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19845734827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3997063 + ... + 4002024.

It is an arithmetic number, because the mean of its divisors is an integer number (3311622432).

Almost surely, 2^19845734847 is an apocalyptic number.

19845734847 is a deficient number, since it is larger than the sum of its proper divisors (6647244609).

19845734847 is an equidigital number, since it uses as much as digits as its factorization.

19845734847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7999917.

The product of its digits is 27095040, while the sum is 60.

The spelling of 19845734847 in words is "nineteen billion, eight hundred forty-five million, seven hundred thirty-four thousand, eight hundred forty-seven".