19686454311364 has 81 divisors (see below), whose sum is σ = 35944769600103. Its totient is φ = 9433861575936.

The previous prime is 19686454311347. The next prime is 19686454311421. The reversal of 19686454311364 is 46311345468691.

The square root of 19686454311364 is 4436942.

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

It can be written as a sum of positive squares in 4 ways, for example, as 896032628100 + 18790421683264 = 946590^2 + 4334792^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 58416778204 + ... + 58416778540.

Almost surely, 2^{19686454311364} is an apocalyptic number.

19686454311364 is the 4436942-nd square number.

It is an amenable number.

19686454311364 is a deficient number, since it is larger than the sum of its proper divisors (16258315288739).

19686454311364 is an frugal number, since it uses more digits than its factorization.

19686454311364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 595 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 61.

The spelling of 19686454311364 in words is "nineteen trillion, six hundred eighty-six billion, four hundred fifty-four million, three hundred eleven thousand, three hundred sixty-four".