20305950 has 96 divisors (see below), whose sum is σ = 58496256. Its totient is φ = 4565760.

The previous prime is 20305931. The next prime is 20305951. The reversal of 20305950 is 5950302.

It is a self number, because there is not a number n which added to its sum of digits gives 20305950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20305951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87034 + ... + 87266.

It is an arithmetic number, because the mean of its divisors is an integer number (609336).

Almost surely, 2^20305950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20305950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29248128).

20305950 is an abundant number, since it is smaller than the sum of its proper divisors (38190306).

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

20305950 is a wasteful number, since it uses less digits than its factorization.

20305950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 20305950 is about 4506.2123784837. The cubic root of 20305950 is about 272.8188899267.

The spelling of 20305950 in words is "twenty million, three hundred five thousand, nine hundred fifty".