195859394020 has 12 divisors (see below), whose sum is σ = 411304727484. Its totient is φ = 78343757600.

The previous prime is 195859394011. The next prime is 195859394023. The reversal of 195859394020 is 20493958591.

It can be written as a sum of positive squares in 2 ways, for example, as 65135206656 + 130724187364 = 255216^2 + 361558^2 .

It is a super-2 number, since 2×195859394020² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (195859394023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4896484831 + ... + 4896484870.

It is an arithmetic number, because the mean of its divisors is an integer number (34275393957).

Almost surely, 2^195859394020 is an apocalyptic number.

195859394020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195859394020 is an abundant number, since it is smaller than the sum of its proper divisors (215445333464).

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

195859394020 is a wasteful number, since it uses less digits than its factorization.

195859394020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9792969710 (or 9792969708 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 55.

The spelling of 195859394020 in words is "one hundred ninety-five billion, eight hundred fifty-nine million, three hundred ninety-four thousand, twenty".