20303900 has 18 divisors (see below), whose sum is σ = 44059680. Its totient is φ = 8121520.

The previous prime is 20303887. The next prime is 20303903. The reversal of 20303900 is 930302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303903) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 101420 + ... + 101619.

It is an arithmetic number, because the mean of its divisors is an integer number (2447760).

Almost surely, 2^20303900 is an apocalyptic number.

20303900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20303900 is an abundant number, since it is smaller than the sum of its proper divisors (23755780).

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

20303900 is a wasteful number, since it uses less digits than its factorization.

20303900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203053 (or 203046 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 20303900 is about 4505.9849089849. The cubic root of 20303900 is about 272.8097087500.

The spelling of 20303900 in words is "twenty million, three hundred three thousand, nine hundred".