18349898112 has 448 divisors, whose sum is σ = 67489164960. Its totient is φ = 4837294080.

The previous prime is 18349898087. The next prime is 18349898113. The reversal of 18349898112 is 21189894381.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18349898113) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 8490312 + ... + 8492472.

Almost surely, 2^18349898112 is an apocalyptic number.

18349898112 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 18349898112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33744582480).

18349898112 is an abundant number, since it is smaller than the sum of its proper divisors (49139266848).

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

18349898112 is an equidigital number, since it uses as much as digits as its factorization.

18349898112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213 (or 2186 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The spelling of 18349898112 in words is "eighteen billion, three hundred forty-nine million, eight hundred ninety-eight thousand, one hundred twelve".