19645025196 has 48 divisors (see below), whose sum is σ = 46972624608. Its totient is φ = 6386419200.

The previous prime is 19645025149. The next prime is 19645025203. The reversal of 19645025196 is 69152054691.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2028606 + ... + 2038266.

It is an arithmetic number, because the mean of its divisors is an integer number (978596346).

Almost surely, 2^19645025196 is an apocalyptic number.

It is an amenable number.

19645025196 is an abundant number, since it is smaller than the sum of its proper divisors (27327599412).

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

19645025196 is a wasteful number, since it uses less digits than its factorization.

19645025196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13842 (or 13840 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 48.

The spelling of 19645025196 in words is "nineteen billion, six hundred forty-five million, twenty-five thousand, one hundred ninety-six".