18140357388 has 96 divisors (see below), whose sum is σ = 45371818240. Its totient is φ = 5623914240.

The previous prime is 18140357387. The next prime is 18140357413. The reversal of 18140357388 is 88375304181.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18140357387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10527495 + ... + 10529217.

Almost surely, 2^18140357388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18140357388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22685909120).

18140357388 is an abundant number, since it is smaller than the sum of its proper divisors (27231460852).

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

18140357388 is a wasteful number, since it uses less digits than its factorization.

18140357388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567 (or 2565 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 18140357388 in words is "eighteen billion, one hundred forty million, three hundred fifty-seven thousand, three hundred eighty-eight".