18640350316 has 24 divisors (see below), whose sum is σ = 37285238816. Its totient is φ = 7987749120.

The previous prime is 18640350307. The next prime is 18640350343. The reversal of 18640350316 is 61305304681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223876 + ... + 295636.

Almost surely, 2^18640350316 is an apocalyptic number.

It is an amenable number.

18640350316 is an abundant number, since it is smaller than the sum of its proper divisors (18644888500).

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

18640350316 is a wasteful number, since it uses less digits than its factorization.

18640350316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81049 (or 81047 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 18640350316 its reverse (61305304681), we get a palindrome (79945654997).

The spelling of 18640350316 in words is "eighteen billion, six hundred forty million, three hundred fifty thousand, three hundred sixteen".