18630543225013 has 16 divisors (see below), whose sum is σ = 19701747233280. Its totient is φ = 17588779545600.

The previous prime is 18630543224987. The next prime is 18630543225031. The reversal of 18630543225013 is 31052234503681.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18630543225013 - 2²⁹ = 18630006354101 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 (18630543220013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21664398 + ... + 22507936.

It is an arithmetic number, because the mean of its divisors is an integer number (1231359202080).

Almost surely, 2^{18630543225013} is an apocalyptic number.

It is an amenable number.

18630543225013 is a deficient number, since it is larger than the sum of its proper divisors (1071204008267).

18630543225013 is a wasteful number, since it uses less digits than its factorization.

18630543225013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860988.

The product of its (nonzero) digits is 518400, while the sum is 43.

Adding to 18630543225013 its reverse (31052234503681), we get a palindrome (49682777728694).

The spelling of 18630543225013 in words is "eighteen trillion, six hundred thirty billion, five hundred forty-three million, two hundred twenty-five thousand, thirteen".