195172020 has 72 divisors (see below), whose sum is σ = 617774976. Its totient is φ = 49781952.

The previous prime is 195172007. The next prime is 195172049. The reversal of 195172020 is 20271591.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19432 + ... + 27711.

It is an arithmetic number, because the mean of its divisors is an integer number (8580208).

Almost surely, 2^195172020 is an apocalyptic number.

195172020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195172020 is an abundant number, since it is smaller than the sum of its proper divisors (422602956).

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

195172020 is a wasteful number, since it uses less digits than its factorization.

195172020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47181 (or 47176 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 195172020 is about 13970.3979900359. The cubic root of 195172020 is about 580.0594667525.

The spelling of 195172020 in words is "one hundred ninety-five million, one hundred seventy-two thousand, twenty".