18143132216 has 16 divisors (see below), whose sum is σ = 37110952440. Its totient is φ = 8246878240.

The previous prime is 18143132213. The next prime is 18143132239. The reversal of 18143132216 is 61223134181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18143132213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103085891 + ... + 103086066.

Almost surely, 2^18143132216 is an apocalyptic number.

It is an amenable number.

18143132216 is an abundant number, since it is smaller than the sum of its proper divisors (18967820224).

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

18143132216 is a wasteful number, since it uses less digits than its factorization.

18143132216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206171974 (or 206171970 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

Adding to 18143132216 its reverse (61223134181), we get a palindrome (79366266397).

The spelling of 18143132216 in words is "eighteen billion, one hundred forty-three million, one hundred thirty-two thousand, two hundred sixteen".