201999930 has 64 divisors (see below), whose sum is σ = 533651328. Its totient is φ = 48527360.

The previous prime is 201999929. The next prime is 201999971. The reversal of 201999930 is 39999102.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34582 + ... + 39998.

It is an arithmetic number, because the mean of its divisors is an integer number (8338302).

Almost surely, 2^201999930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201999930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266825664).

201999930 is an abundant number, since it is smaller than the sum of its proper divisors (331651398).

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

201999930 is a wasteful number, since it uses less digits than its factorization.

201999930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5551.

The product of its (nonzero) digits is 39366, while the sum is 42.

The square root of 201999930 is about 14212.6679409603. The cubic root of 201999930 is about 586.7463630683.

The spelling of 201999930 in words is "two hundred one million, nine hundred ninety-nine thousand, nine hundred thirty".