195931820 has 24 divisors (see below), whose sum is σ = 470236704. Its totient is φ = 67176576.

The previous prime is 195931777. The next prime is 195931823. The reversal of 195931820 is 28139591.

195931820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (195931823) 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, 699617 + ... + 699896.

It is an arithmetic number, because the mean of its divisors is an integer number (19593196).

Almost surely, 2^195931820 is an apocalyptic number.

195931820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195931820 is an abundant number, since it is smaller than the sum of its proper divisors (274304884).

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

195931820 is a wasteful number, since it uses less digits than its factorization.

195931820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399529 (or 1399527 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 195931820 is about 13997.5647882051. The cubic root of 195931820 is about 580.8112112913.

The spelling of 195931820 in words is "one hundred ninety-five million, nine hundred thirty-one thousand, eight hundred twenty".