1023203220 has 48 divisors (see below), whose sum is σ = 3085353600. Its totient is φ = 251865216.

The previous prime is 1023203183. The next prime is 1023203221. The reversal of 1023203220 is 223023201.

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 1023203220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023203221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655120 + ... + 656679.

It is an arithmetic number, because the mean of its divisors is an integer number (64278200).

Almost surely, 2^1023203220 is an apocalyptic number.

1023203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023203220 is an abundant number, since it is smaller than the sum of its proper divisors (2062150380).

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

1023203220 is a wasteful number, since it uses less digits than its factorization.

1023203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311824 (or 1311822 counting only the distinct ones).

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

The square root of 1023203220 is about 31987.5478897649. The cubic root of 1023203220 is about 1007.6753450249.

Adding to 1023203220 its reverse (223023201), we get a palindrome (1246226421).

The spelling of 1023203220 in words is "one billion, twenty-three million, two hundred three thousand, two hundred twenty".