17388786421372 has 12 divisors (see below), whose sum is σ = 30598499864296. Its totient is φ = 8646357888720.

The previous prime is 17388786421283. The next prime is 17388786421373. The reversal of 17388786421372 is 27312468788371.

It is a junction number, because it is equal to n+sod(n) for n = 17388786421298 and 17388786421307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17388786421373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12008829678 + ... + 12008831125.

Almost surely, 2^{17388786421372} is an apocalyptic number.

It is an amenable number.

17388786421372 is a deficient number, since it is larger than the sum of its proper divisors (13209713442924).

17388786421372 is a wasteful number, since it uses less digits than its factorization.

17388786421372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24017660988 (or 24017660986 counting only the distinct ones).

The product of its digits is 151732224, while the sum is 67.

The spelling of 17388786421372 in words is "seventeen trillion, three hundred eighty-eight billion, seven hundred eighty-six million, four hundred twenty-one thousand, three hundred seventy-two".