19448644906 has 16 divisors (see below), whose sum is σ = 29333933568. Its totient is φ = 9670696000.

The previous prime is 19448644903. The next prime is 19448644927. The reversal of 19448644906 is 60944684491.

It is not an unprimeable number, because it can be changed into a prime (19448644903) 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, 2606481 + ... + 2613931.

It is an arithmetic number, because the mean of its divisors is an integer number (1833370848).

Almost surely, 2^19448644906 is an apocalyptic number.

19448644906 is a deficient number, since it is larger than the sum of its proper divisors (9885288662).

19448644906 is a wasteful number, since it uses less digits than its factorization.

19448644906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14477.

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 19448644906 in words is "nineteen billion, four hundred forty-eight million, six hundred forty-four thousand, nine hundred six".