19784072446 has 16 divisors (see below), whose sum is σ = 29996107776. Its totient is φ = 9785819736.

The previous prime is 19784072437. The next prime is 19784072447. The reversal of 19784072446 is 64427048791.

It is a junction number, because it is equal to n+sod(n) for n = 19784072393 and 19784072402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19784072447) 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, 24096 + ... + 200371.

It is an arithmetic number, because the mean of its divisors is an integer number (1874756736).

Almost surely, 2^19784072446 is an apocalyptic number.

19784072446 is a deficient number, since it is larger than the sum of its proper divisors (10212035330).

19784072446 is a wasteful number, since it uses less digits than its factorization.

19784072446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224943.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 19784072446 in words is "nineteen billion, seven hundred eighty-four million, seventy-two thousand, four hundred forty-six".