19785895228 has 24 divisors (see below), whose sum is σ = 37853996544. Its totient is φ = 8974321200.

The previous prime is 19785895189. The next prime is 19785895243. The reversal of 19785895228 is 82259858791.

It is a self number, because there is not a number n which added to its sum of digits gives 19785895228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460908 + ... + 502003.

It is an arithmetic number, because the mean of its divisors is an integer number (1577249856).

Almost surely, 2^19785895228 is an apocalyptic number.

It is an amenable number.

19785895228 is a deficient number, since it is larger than the sum of its proper divisors (18068101316).

19785895228 is a wasteful number, since it uses less digits than its factorization.

19785895228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963393 (or 963391 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 64.

The spelling of 19785895228 in words is "nineteen billion, seven hundred eighty-five million, eight hundred ninety-five thousand, two hundred twenty-eight".