18120953232 has 120 divisors (see below), whose sum is σ = 52814536320. Its totient is φ = 6014736000.

The previous prime is 18120953209. The next prime is 18120953233. The reversal of 18120953232 is 23235902181.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18120953233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 919482 + ... + 938982.

It is an arithmetic number, because the mean of its divisors is an integer number (440121136).

Almost surely, 2^18120953232 is an apocalyptic number.

18120953232 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 18120953232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26407268160).

18120953232 is an abundant number, since it is smaller than the sum of its proper divisors (34693583088).

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

18120953232 is a wasteful number, since it uses less digits than its factorization.

18120953232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19763 (or 19745 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 18120953232 in words is "eighteen billion, one hundred twenty million, nine hundred fifty-three thousand, two hundred thirty-two".