195949518 has 16 divisors (see below), whose sum is σ = 395495760. Its totient is φ = 64717056.

The previous prime is 195949517. The next prime is 195949519. The reversal of 195949518 is 815949591.

It is an interprime number because it is at equal distance from previous prime (195949517) and next prime (195949519).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195949511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149155 + ... + 150462.

It is an arithmetic number, because the mean of its divisors is an integer number (24718485).

Almost surely, 2^195949518 is an apocalyptic number.

195949518 is an abundant number, since it is smaller than the sum of its proper divisors (199546242).

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

195949518 is a wasteful number, since it uses less digits than its factorization.

195949518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299731.

The product of its digits is 583200, while the sum is 51.

The square root of 195949518 is about 13998.1969553225. The cubic root of 195949518 is about 580.8286984753.

The spelling of 195949518 in words is "one hundred ninety-five million, nine hundred forty-nine thousand, five hundred eighteen".