18217856483 has 16 divisors (see below), whose sum is σ = 19124737632. Its totient is φ = 17334240000.

The previous prime is 18217856453. The next prime is 18217856509. The reversal of 18217856483 is 38465871281.

It is a cyclic number.

It is not a de Polignac number, because 18217856483 - 2¹⁰ = 18217855459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18217856443) 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, 1228493 + ... + 1243233.

It is an arithmetic number, because the mean of its divisors is an integer number (1195296102).

Almost surely, 2^18217856483 is an apocalyptic number.

18217856483 is a deficient number, since it is larger than the sum of its proper divisors (906881149).

18217856483 is a wasteful number, since it uses less digits than its factorization.

18217856483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15526.

The product of its digits is 2580480, while the sum is 53.

The spelling of 18217856483 in words is "eighteen billion, two hundred seventeen million, eight hundred fifty-six thousand, four hundred eighty-three".