18348642322749 has 14 divisors (see below), whose sum is σ = 27510378682526. Its totient is φ = 12232428214680.

The previous prime is 18348642322711. The next prime is 18348642322789. The reversal of 18348642322749 is 94722324684381.

18348642322749 is a `hidden beast` number, since 1 + 8 + 348 + 6 + 4 + 23 + 227 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10749991723524 + 7598650599225 = 3278718^2 + 2756565^2 .

It is not a de Polignac number, because 18348642322749 - 2¹² = 18348642318653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18348642322789) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 12584801962 + ... + 12584803419.

Almost surely, 2^{18348642322749} is an apocalyptic number.

It is an amenable number.

18348642322749 is a deficient number, since it is larger than the sum of its proper divisors (9161736359777).

18348642322749 is an frugal number, since it uses more digits than its factorization.

18348642322749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25169605399 (or 25169605384 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 63.

The spelling of 18348642322749 in words is "eighteen trillion, three hundred forty-eight billion, six hundred forty-two million, three hundred twenty-two thousand, seven hundred forty-nine".