203220420 has 48 divisors (see below), whose sum is σ = 612790080. Its totient is φ = 50023296.

The previous prime is 203220419. The next prime is 203220421. The reversal of 203220420 is 24022302.

It is an interprime number because it is at equal distance from previous prime (203220419) and next prime (203220421).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 203220420.

It is not an unprimeable number, because it can be changed into a prime (203220421) 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 15 ways as a sum of consecutive naturals, for example, 129490 + ... + 131049.

It is an arithmetic number, because the mean of its divisors is an integer number (12766460).

Almost surely, 2^203220420 is an apocalyptic number.

203220420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203220420 is an abundant number, since it is smaller than the sum of its proper divisors (409569660).

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

203220420 is a wasteful number, since it uses less digits than its factorization.

203220420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260564 (or 260562 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 203220420 is about 14255.5399757428. The cubic root of 203220420 is about 587.9257044359.

Adding to 203220420 its reverse (24022302), we get a palindrome (227242722).

The spelling of 203220420 in words is "two hundred three million, two hundred twenty thousand, four hundred twenty".