19219615228 has 48 divisors (see below), whose sum is σ = 38756551680. Its totient is φ = 8257737600.

The previous prime is 19219615153. The next prime is 19219615241. The reversal of 19219615228 is 82251691291.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105193 + ... + 222496.

It is an arithmetic number, because the mean of its divisors is an integer number (807428160).

Almost surely, 2^19219615228 is an apocalyptic number.

It is an amenable number.

19219615228 is an abundant number, since it is smaller than the sum of its proper divisors (19536936452).

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

19219615228 is a wasteful number, since it uses less digits than its factorization.

19219615228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327778 (or 327776 counting only the distinct ones).

The product of its digits is 155520, while the sum is 46.

The spelling of 19219615228 in words is "nineteen billion, two hundred nineteen million, six hundred fifteen thousand, two hundred twenty-eight".