199997020 has 24 divisors (see below), whose sum is σ = 427114800. Its totient is φ = 78642432.

The previous prime is 199997009. The next prime is 199997033. The reversal of 199997020 is 20799991.

199997020 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

199997020 is strictly pandigital in base 9.

It is a congruent number.

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, 83565 + ... + 85924.

It is an arithmetic number, because the mean of its divisors is an integer number (17796450).

Almost surely, 2^199997020 is an apocalyptic number.

199997020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199997020 is an abundant number, since it is smaller than the sum of its proper divisors (227117780).

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

199997020 is a wasteful number, since it uses less digits than its factorization.

199997020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169557 (or 169555 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 46.

The square root of 199997020 is about 14142.0302644281. The cubic root of 199997020 is about 584.8006431039.

The spelling of 199997020 in words is "one hundred ninety-nine million, nine hundred ninety-seven thousand, twenty".