19775929686388 has 12 divisors (see below), whose sum is σ = 34608053293632. Its totient is φ = 9887914459640.

The previous prime is 19775929686377. The next prime is 19775929686419. The reversal of 19775929686388 is 88368692957791.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19775929686299 and 19775929686308.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 11705758 + ... + 13288213.

It is an arithmetic number, because the mean of its divisors is an integer number (2884004441136).

Almost surely, 2^{19775929686388} is an apocalyptic number.

It is an amenable number.

19775929686388 is a deficient number, since it is larger than the sum of its proper divisors (14832123607244).

19775929686388 is a wasteful number, since it uses less digits than its factorization.

19775929686388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25191782 (or 25191780 counting only the distinct ones).

The product of its digits is 19752284160, while the sum is 88.

The spelling of 19775929686388 in words is "nineteen trillion, seven hundred seventy-five billion, nine hundred twenty-nine million, six hundred eighty-six thousand, three hundred eighty-eight".