19994194823148 has 432 divisors, whose sum is σ = 66663591234240. Its totient is φ = 4919059611648.

The previous prime is 19994194823147. The next prime is 19994194823179. The reversal of 19994194823148 is 84132849149991.

19994194823148 is a `hidden beast` number, since 1 + 9 + 9 + 9 + 419 + 48 + 23 + 148 = 666.

It is not an unprimeable number, because it can be changed into a prime (19994194823147) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 106890888 + ... + 107077776.

Almost surely, 2^{19994194823148} is an apocalyptic number.

19994194823148 is a gapful number since it is divisible by the number (18) 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 19994194823148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33331795617120).

19994194823148 is an abundant number, since it is smaller than the sum of its proper divisors (46669396411092).

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

19994194823148 is a wasteful number, since it uses less digits than its factorization.

19994194823148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187066 (or 187044 counting only the distinct ones).

The product of its digits is 161243136, while the sum is 72.

The spelling of 19994194823148 in words is "nineteen trillion, nine hundred ninety-four billion, one hundred ninety-four million, eight hundred twenty-three thousand, one hundred forty-eight".