19228251872 has 48 divisors (see below), whose sum is σ = 39181287600. Its totient is φ = 9277793280.

The previous prime is 19228251851. The next prime is 19228251881. The reversal of 19228251872 is 27815282291.

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 7 ways as a sum of consecutive naturals, for example, 2335379 + ... + 2343597.

It is an arithmetic number, because the mean of its divisors is an integer number (816276825).

Almost surely, 2^19228251872 is an apocalyptic number.

It is an amenable number.

19228251872 is an abundant number, since it is smaller than the sum of its proper divisors (19953035728).

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

19228251872 is a wasteful number, since it uses less digits than its factorization.

19228251872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10779 (or 10771 counting only the distinct ones).

The product of its digits is 322560, while the sum is 47.

The spelling of 19228251872 in words is "nineteen billion, two hundred twenty-eight million, two hundred fifty-one thousand, eight hundred seventy-two".