194201897220 has 384 divisors, whose sum is σ = 639597772800. Its totient is φ = 48866148864.

The previous prime is 194201897191. The next prime is 194201897233. The reversal of 194201897220 is 22798102491.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 79362037 + ... + 79364483.

It is an arithmetic number, because the mean of its divisors is an integer number (1665619200).

Almost surely, 2^194201897220 is an apocalyptic number.

194201897220 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 194201897220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319798886400).

194201897220 is an abundant number, since it is smaller than the sum of its proper divisors (445395875580).

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

194201897220 is a wasteful number, since it uses less digits than its factorization.

194201897220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624 (or 2616 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 194201897220 in words is "one hundred ninety-four billion, two hundred one million, eight hundred ninety-seven thousand, two hundred twenty".