18385533355 has 16 divisors (see below), whose sum is σ = 25437587904. Its totient is φ = 12495651840.

The previous prime is 18385533347. The next prime is 18385533379. The reversal of 18385533355 is 55333558381.

It is not a de Polignac number, because 18385533355 - 2³ = 18385533347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18385533299 and 18385533308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2320386 + ... + 2328295.

It is an arithmetic number, because the mean of its divisors is an integer number (1589849244).

Almost surely, 2^18385533355 is an apocalyptic number.

18385533355 is a deficient number, since it is larger than the sum of its proper divisors (7052054549).

18385533355 is a wasteful number, since it uses less digits than its factorization.

18385533355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4648806.

The product of its digits is 3240000, while the sum is 49.

The spelling of 18385533355 in words is "eighteen billion, three hundred eighty-five million, five hundred thirty-three thousand, three hundred fifty-five".