18999816192 has 468 divisors, whose sum is σ = 65775826896. Its totient is φ = 5374771200.

The previous prime is 18999816181. The next prime is 18999816211. The reversal of 18999816192 is 29161899981.

18999816192 is a `hidden beast` number, since 1 + 8 + 9 + 9 + 9 + 8 + 1 + 619 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 188116942 + ... + 188117042.

Almost surely, 2^18999816192 is an apocalyptic number.

18999816192 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 18999816192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32887913448).

18999816192 is an abundant number, since it is smaller than the sum of its proper divisors (46776010704).

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

18999816192 is an frugal number, since it uses more digits than its factorization.

18999816192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 113 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 63.

The spelling of 18999816192 in words is "eighteen billion, nine hundred ninety-nine million, eight hundred sixteen thousand, one hundred ninety-two".