18231962112 has 400 divisors, whose sum is σ = 66989379072. Its totient is φ = 4807434240.

The previous prime is 18231962087. The next prime is 18231962143. The reversal of 18231962112 is 21126913281.

18231962112 is a `hidden beast` number, since 1 + 8 + 2 + 3 + 19 + 621 + 12 = 666.

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

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3771537 + ... + 3776367.

Almost surely, 2^18231962112 is an apocalyptic number.

18231962112 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 18231962112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33494689536).

18231962112 is an abundant number, since it is smaller than the sum of its proper divisors (48757416960).

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

18231962112 is an equidigital number, since it uses as much as digits as its factorization.

18231962112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4881 (or 4856 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The spelling of 18231962112 in words is "eighteen billion, two hundred thirty-one million, nine hundred sixty-two thousand, one hundred twelve".