195981012 has 24 divisors (see below), whose sum is σ = 508099200. Its totient is φ = 65326968.

The previous prime is 195980989. The next prime is 195981017. The reversal of 195981012 is 210189591.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195981017) 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 7 ways as a sum of consecutive naturals, for example, 907212 + ... + 907427.

It is an arithmetic number, because the mean of its divisors is an integer number (21170800).

Almost surely, 2^195981012 is an apocalyptic number.

195981012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

195981012 is an abundant number, since it is smaller than the sum of its proper divisors (312118188).

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

195981012 is a wasteful number, since it uses less digits than its factorization.

195981012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814652 (or 1814644 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The square root of 195981012 is about 13999.3218407179. The cubic root of 195981012 is about 580.8598147194.

The spelling of 195981012 in words is "one hundred ninety-five million, nine hundred eighty-one thousand, twelve".