203421220 has 24 divisors (see below), whose sum is σ = 449668800. Its totient is φ = 77085792.

The previous prime is 203421209. The next prime is 203421221. The reversal of 203421220 is 22124302.

It is a junction number, because it is equal to n+sod(n) for n = 203421194 and 203421203.

It is not an unprimeable number, because it can be changed into a prime (203421221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267280 + ... + 268039.

It is an arithmetic number, because the mean of its divisors is an integer number (18736200).

Almost surely, 2^203421220 is an apocalyptic number.

203421220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203421220 is an abundant number, since it is smaller than the sum of its proper divisors (246247580).

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

203421220 is a wasteful number, since it uses less digits than its factorization.

203421220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535347 (or 535345 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 203421220 is about 14262.5811128281. The cubic root of 203421220 is about 588.1192817999.

Adding to 203421220 its reverse (22124302), we get a palindrome (225545522).

The spelling of 203421220 in words is "two hundred three million, four hundred twenty-one thousand, two hundred twenty".