19446688136 has 16 divisors (see below), whose sum is σ = 36976098240. Its totient is φ = 9586395280.

The previous prime is 19446688073. The next prime is 19446688139. The reversal of 19446688136 is 63188664491.

It is not an unprimeable number, because it can be changed into a prime (19446688139) 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, 17117996 + ... + 17119131.

It is an arithmetic number, because the mean of its divisors is an integer number (2311006140).

Almost surely, 2^19446688136 is an apocalyptic number.

It is an amenable number.

19446688136 is a deficient number, since it is larger than the sum of its proper divisors (17529410104).

19446688136 is a wasteful number, since it uses less digits than its factorization.

19446688136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34237204 (or 34237200 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 56.

The spelling of 19446688136 in words is "nineteen billion, four hundred forty-six million, six hundred eighty-eight thousand, one hundred thirty-six".