18329910912 has 48 divisors (see below), whose sum is σ = 52746231330. Its totient is φ = 6109969920.

The previous prime is 18329910887. The next prime is 18329910917. The reversal of 18329910912 is 21901992381.

It can be written as a sum of positive squares in only one way, i.e., 15930478656 + 2399432256 = 126216^2 + 48984^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (18329910917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7954539 + ... + 7956842.

Almost surely, 2^18329910912 is an apocalyptic number.

18329910912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18329910912 is an abundant number, since it is smaller than the sum of its proper divisors (34416320418).

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

18329910912 is a wasteful number, since it uses less digits than its factorization.

18329910912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15911401 (or 15911386 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The spelling of 18329910912 in words is "eighteen billion, three hundred twenty-nine million, nine hundred ten thousand, nine hundred twelve".