18385517063 has 8 divisors (see below), whose sum is σ = 19069171200. Its totient is φ = 17705174368.

The previous prime is 18385516997. The next prime is 18385517093. The reversal of 18385517063 is 36071558381.

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 18385517063 - 2²⁴ = 18368739847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18385516999 and 18385517017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18385517093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816548 + ... + 838761.

It is an arithmetic number, because the mean of its divisors is an integer number (2383646400).

Almost surely, 2^18385517063 is an apocalyptic number.

18385517063 is a deficient number, since it is larger than the sum of its proper divisors (683654137).

18385517063 is a wasteful number, since it uses less digits than its factorization.

18385517063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655721.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 18385517063 in words is "eighteen billion, three hundred eighty-five million, five hundred seventeen thousand, sixty-three".