18508985363 has 4 divisors (see below), whose sum is σ = 20191620408. Its totient is φ = 16826350320.

The previous prime is 18508985323. The next prime is 18508985377. The reversal of 18508985363 is 36358980581.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18508985363 - 2¹⁴ = 18508968979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18508985299 and 18508985308.

It is not an unprimeable number, because it can be changed into a prime (18508985323) 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, 841317506 + ... + 841317527.

It is an arithmetic number, because the mean of its divisors is an integer number (5047905102).

Almost surely, 2^18508985363 is an apocalyptic number.

18508985363 is a deficient number, since it is larger than the sum of its proper divisors (1682635045).

18508985363 is a wasteful number, since it uses less digits than its factorization.

18508985363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682635044.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 18508985363 in words is "eighteen billion, five hundred eight million, nine hundred eighty-five thousand, three hundred sixty-three".