18485984216 has 24 divisors (see below), whose sum is σ = 40320196020. Its totient is φ = 7922564496.

The previous prime is 18485984197. The next prime is 18485984221. The reversal of 18485984216 is 61248958481.

It is a super-2 number, since 2×18485984216² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23578670 + ... + 23579453.

Almost surely, 2^18485984216 is an apocalyptic number.

It is an amenable number.

18485984216 is an abundant number, since it is smaller than the sum of its proper divisors (21834211804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18485984216 is a wasteful number, since it uses less digits than its factorization.

18485984216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47158143 (or 47158132 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 56.

The spelling of 18485984216 in words is "eighteen billion, four hundred eighty-five million, nine hundred eighty-four thousand, two hundred sixteen".