18169828884 has 18 divisors (see below), whose sum is σ = 45929289770. Its totient is φ = 6056609616.

The previous prime is 18169828829. The next prime is 18169828961. The reversal of 18169828884 is 48882896181.

It can be written as a sum of positive squares in only one way, i.e., 13462496784 + 4707332100 = 116028^2 + 68610^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×18169828884³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 252358699 + ... + 252358770.

Almost surely, 2^18169828884 is an apocalyptic number.

It is an amenable number.

18169828884 is an abundant number, since it is smaller than the sum of its proper divisors (27759460886).

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

18169828884 is a wasteful number, since it uses less digits than its factorization.

18169828884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504717479 (or 504717474 counting only the distinct ones).

The product of its digits is 14155776, while the sum is 63.

The spelling of 18169828884 in words is "eighteen billion, one hundred sixty-nine million, eight hundred twenty-eight thousand, eight hundred eighty-four".