19755642551824 has 15 divisors (see below), whose sum is σ = 38276591890863. Its totient is φ = 9877812386448.

The previous prime is 19755642551803. The next prime is 19755642551857. The reversal of 19755642551824 is 42815524655791.

The square root of 19755642551824 is 4444732.

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

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17223337 + ... + 18334519.

Almost surely, 2^{19755642551824} is an apocalyptic number.

19755642551824 is the 4444732-nd square number.

It is an amenable number.

19755642551824 is a deficient number, since it is larger than the sum of its proper divisors (18520949339039).

19755642551824 is an frugal number, since it uses more digits than its factorization.

19755642551824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222374 (or 1111185 counting only the distinct ones).

The product of its digits is 120960000, while the sum is 64.

The spelling of 19755642551824 in words is "nineteen trillion, seven hundred fifty-five billion, six hundred forty-two million, five hundred fifty-one thousand, eight hundred twenty-four".