195987456020 has 24 divisors (see below), whose sum is σ = 429468165504. Its totient is φ = 74986504736.

The previous prime is 195987456019. The next prime is 195987456029. The reversal of 195987456020 is 20654789591.

It is a super-3 number, since 3×195987456020³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195987456029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213029384 + ... + 213030303.

It is an arithmetic number, because the mean of its divisors is an integer number (17894506896).

Almost surely, 2^195987456020 is an apocalyptic number.

195987456020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195987456020 is an abundant number, since it is smaller than the sum of its proper divisors (233480709484).

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

195987456020 is a wasteful number, since it uses less digits than its factorization.

195987456020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426059719 (or 426059717 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 195987456020 in words is "one hundred ninety-five billion, nine hundred eighty-seven million, four hundred fifty-six thousand, twenty".