194139067920 has 320 divisors, whose sum is σ = 755488788480. Its totient is φ = 40211195904.

The previous prime is 194139067909. The next prime is 194139067921. The reversal of 194139067920 is 29760931491.

It is not an unprimeable number, because it can be changed into a prime (194139067921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 601942 + ... + 866378.

It is an arithmetic number, because the mean of its divisors is an integer number (2360902464).

Almost surely, 2^194139067920 is an apocalyptic number.

194139067920 is a gapful number since it is divisible by the number (10) 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 194139067920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377744394240).

194139067920 is an abundant number, since it is smaller than the sum of its proper divisors (561349720560).

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

194139067920 is a wasteful number, since it uses less digits than its factorization.

194139067920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264502 (or 264496 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 51.

The spelling of 194139067920 in words is "one hundred ninety-four billion, one hundred thirty-nine million, sixty-seven thousand, nine hundred twenty".