19931227684 has 9 divisors (see below), whose sum is σ = 34880142577. Its totient is φ = 9965472664.

The previous prime is 19931227681. The next prime is 19931227831. The reversal of 19931227684 is 48672213991.

The square root of 19931227684 is 141178.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4959258084 + 14971969600 = 70422^2 + 122360^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19931227681) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 247062 + ... + 317650.

Almost surely, 2^19931227684 is an apocalyptic number.

19931227684 is the 141178-th square number.

It is an amenable number.

19931227684 is a deficient number, since it is larger than the sum of its proper divisors (14948914893).

19931227684 is an frugal number, since it uses more digits than its factorization.

19931227684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141182 (or 70591 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The spelling of 19931227684 in words is "nineteen billion, nine hundred thirty-one million, two hundred twenty-seven thousand, six hundred eighty-four".