1230203220 has 24 divisors (see below), whose sum is σ = 3444569184. Its totient is φ = 328054176.

The previous prime is 1230203209. The next prime is 1230203291. The reversal of 1230203220 is 223020321.

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 1230203220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10251634 + ... + 10251753.

It is an arithmetic number, because the mean of its divisors is an integer number (143523716).

Almost surely, 2^1230203220 is an apocalyptic number.

1230203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230203220 is an abundant number, since it is smaller than the sum of its proper divisors (2214365964).

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

1230203220 is a wasteful number, since it uses less digits than its factorization.

1230203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20503399 (or 20503397 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1230203220 is about 35074.2529499917. The cubic root of 1230203220 is about 1071.5002741093.

Adding to 1230203220 its reverse (223020321), we get a palindrome (1453223541).

The spelling of 1230203220 in words is "one billion, two hundred thirty million, two hundred three thousand, two hundred twenty".