1220333020 has 24 divisors (see below), whose sum is σ = 2625205968. Its totient is φ = 476227200.

The previous prime is 1220332973. The next prime is 1220333029. The reversal of 1220333020 is 203330221.

It is a junction number, because it is equal to n+sod(n) for n = 1220332985 and 1220333003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220333029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 743286 + ... + 744925.

It is an arithmetic number, because the mean of its divisors is an integer number (109383582).

Almost surely, 2^1220333020 is an apocalyptic number.

1220333020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220333020 is an abundant number, since it is smaller than the sum of its proper divisors (1404872948).

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

1220333020 is a wasteful number, since it uses less digits than its factorization.

1220333020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488261 (or 1488259 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 1220333020 is about 34933.2652353026. The cubic root of 1220333020 is about 1068.6269458314.

Adding to 1220333020 its reverse (203330221), we get a palindrome (1423663241).

The spelling of 1220333020 in words is "one billion, two hundred twenty million, three hundred thirty-three thousand, twenty".