19784428782 has 8 divisors (see below), whose sum is σ = 39568857576. Its totient is φ = 6594809592.

The previous prime is 19784428739. The next prime is 19784428787. The reversal of 19784428782 is 28782448791.

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

19784428782 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19784428787) 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, 1648702393 + ... + 1648702404.

It is an arithmetic number, because the mean of its divisors is an integer number (4946107197).

Almost surely, 2^19784428782 is an apocalyptic number.

19784428782 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19784428782 is a wasteful number, since it uses less digits than its factorization.

19784428782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297404802.

The product of its digits is 14450688, while the sum is 60.

The spelling of 19784428782 in words is "nineteen billion, seven hundred eighty-four million, four hundred twenty-eight thousand, seven hundred eighty-two".