18683329978369 has 8 divisors (see below), whose sum is σ = 21435460299648. Its totient is φ = 15951970452480.

The previous prime is 18683329978351. The next prime is 18683329978429. The reversal of 18683329978369 is 96387992338681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18683329978369 - 2²¹ = 18683327881217 is a prime.

It is a super-2 number, since 2×18683329978369² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18683329978292 and 18683329978301.

It is not an unprimeable number, because it can be changed into a prime (18683329978769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5192696917 + ... + 5192700514.

It is an arithmetic number, because the mean of its divisors is an integer number (2679432537456).

Almost surely, 2^{18683329978369} is an apocalyptic number.

It is an amenable number.

18683329978369 is a deficient number, since it is larger than the sum of its proper divisors (2752130321279).

18683329978369 is a wasteful number, since it uses less digits than its factorization.

18683329978369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10385397695.

The product of its digits is 5079158784, while the sum is 82.

The spelling of 18683329978369 in words is "eighteen trillion, six hundred eighty-three billion, three hundred twenty-nine million, nine hundred seventy-eight thousand, three hundred sixty-nine".