203203420 has 48 divisors (see below), whose sum is σ = 494581248. Its totient is φ = 68685120.

The previous prime is 203203417. The next prime is 203203453. The reversal of 203203420 is 24302302.

It is a junction number, because it is equal to n+sod(n) for n = 203203394 and 203203403.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 282 + ... + 20161.

It is an arithmetic number, because the mean of its divisors is an integer number (10303776).

Almost surely, 2^203203420 is an apocalyptic number.

203203420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203203420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247290624).

203203420 is an abundant number, since it is smaller than the sum of its proper divisors (291377828).

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

203203420 is a wasteful number, since it uses less digits than its factorization.

203203420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20530 (or 20528 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 203203420 is about 14254.9437038524. The cubic root of 203203420 is about 587.9093100603.

Adding to 203203420 its reverse (24302302), we get a palindrome (227505722).

The spelling of 203203420 in words is "two hundred three million, two hundred three thousand, four hundred twenty".