199985020 has 24 divisors (see below), whose sum is σ = 420268464. Its totient is φ = 79936896.

The previous prime is 199985011. The next prime is 199985021. The reversal of 199985020 is 20589991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199985021) 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, 35647 + ... + 40873.

It is an arithmetic number, because the mean of its divisors is an integer number (17511186).

Almost surely, 2^199985020 is an apocalyptic number.

199985020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199985020 is an abundant number, since it is smaller than the sum of its proper divisors (220283444).

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

199985020 is a wasteful number, since it uses less digits than its factorization.

199985020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7149 (or 7147 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 199985020 is about 14141.6059908343. The cubic root of 199985020 is about 584.7889466828.

The spelling of 199985020 in words is "one hundred ninety-nine million, nine hundred eighty-five thousand, twenty".