19784874099 has 8 divisors (see below), whose sum is σ = 27092800720. Its totient is φ = 12833431776.

The previous prime is 19784874089. The next prime is 19784874107. The reversal of 19784874099 is 99047848791.

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

It is a de Polignac number, because none of the positive numbers 2^k-19784874099 is a prime.

It is a super-2 number, since 2×19784874099² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19784874079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89120944 + ... + 89121165.

It is an arithmetic number, because the mean of its divisors is an integer number (3386600090).

Almost surely, 2^19784874099 is an apocalyptic number.

19784874099 is a deficient number, since it is larger than the sum of its proper divisors (7307926621).

19784874099 is a wasteful number, since it uses less digits than its factorization.

19784874099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178242149.

The product of its (nonzero) digits is 36578304, while the sum is 66.

The spelling of 19784874099 in words is "nineteen billion, seven hundred eighty-four million, eight hundred seventy-four thousand, ninety-nine".