18609853632 has 112 divisors (see below), whose sum is σ = 50678974080. Its totient is φ = 6024368128.

The previous prime is 18609853627. The next prime is 18609853649. The reversal of 18609853632 is 23635890681.

It is a happy number.

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, 930328 + ... + 950120.

It is an arithmetic number, because the mean of its divisors is an integer number (452490840).

Almost surely, 2^18609853632 is an apocalyptic number.

18609853632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18609853632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25339487040).

18609853632 is an abundant number, since it is smaller than the sum of its proper divisors (32069120448).

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

18609853632 is a wasteful number, since it uses less digits than its factorization.

18609853632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19950 (or 19940 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 18609853632 in words is "eighteen billion, six hundred nine million, eight hundred fifty-three thousand, six hundred thirty-two".