19932447788929 has 27 divisors (see below), whose sum is σ = 22055672427267. Its totient is φ = 18005246158224.

The previous prime is 19932447788879. The next prime is 19932447788933. The reversal of 19932447788929 is 92988774423991.

The square root of 19932447788929 is 4464577.

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., 2948586951025 + 16983860837904 = 1717145^2 + 4121148^2 .

It is not a de Polignac number, because 19932447788929 - 2³⁷ = 19795008835457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19932447788129) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2727852894 + ... + 2727860200.

Almost surely, 2^{19932447788929} is an apocalyptic number.

19932447788929 is the 4464577-th square number.

19932447788929 is the 2232289-th centered octagonal number.

It is an amenable number.

19932447788929 is a deficient number, since it is larger than the sum of its proper divisors (2123224638338).

19932447788929 is an frugal number, since it uses more digits than its factorization.

19932447788929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14734 (or 7367 counting only the distinct ones).

The product of its digits is 3950456832, while the sum is 82.

The spelling of 19932447788929 in words is "nineteen trillion, nine hundred thirty-two billion, four hundred forty-seven million, seven hundred eighty-eight thousand, nine hundred twenty-nine".