199971020 has 24 divisors (see below), whose sum is σ = 420535584. Its totient is φ = 79874816.

The previous prime is 199970999. The next prime is 199971077. The reversal of 199971020 is 20179991.

199971020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8132 + ... + 21588.

It is an arithmetic number, because the mean of its divisors is an integer number (17522316).

Almost surely, 2^199971020 is an apocalyptic number.

199971020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199971020 is an abundant number, since it is smaller than the sum of its proper divisors (220564564).

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

199971020 is a wasteful number, since it uses less digits than its factorization.

199971020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14209 (or 14207 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 199971020 is about 14141.1109888863. The cubic root of 199971020 is about 584.7753002668.

The spelling of 199971020 in words is "one hundred ninety-nine million, nine hundred seventy-one thousand, twenty".