18143827688 has 64 divisors (see below), whose sum is σ = 39156203520. Its totient is φ = 7720804800.

The previous prime is 18143827657. The next prime is 18143827717. The reversal of 18143827688 is 88672834181.

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

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, 5380643 + ... + 5384013.

It is an arithmetic number, because the mean of its divisors is an integer number (611815680).

Almost surely, 2^18143827688 is an apocalyptic number.

It is an amenable number.

18143827688 is an abundant number, since it is smaller than the sum of its proper divisors (21012375832).

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

18143827688 is a wasteful number, since it uses less digits than its factorization.

18143827688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038 (or 4034 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 56.

The spelling of 18143827688 in words is "eighteen billion, one hundred forty-three million, eight hundred twenty-seven thousand, six hundred eighty-eight".